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REVIEW
OF RESEARCH
AND BUSINESS RESULTS
OF THE IMS INSTITUTE
IN 2017
PREGLED
NAUČNIH I STRUČNIH
REZULTATA
INSTITUTA IMS
U 2017. GODINI
Institut za ispitivanje materijala a.d.
Beograd, decembar 2017.
PREGLED NAUČNIH I STRUČNIH REZULTATA
INSTITUTA IMS U 2017. GODINI
REVIEW OF RESEARCH AND BUSINESS RESULTS
OF THE IMS INSTITUTE IN 2017
Izdavač
Institut IMS a.d.
Beograd, Bulevar vojvode Mišića 43
www.institutims.rs
Za izdavača
Dr Vencislav Grabulov
Urednici
Dr Vencislav Grabulov
Dr Aleksandra Mitrović
Goran Petrović
Štampa
Razvojno-istraživački centar grafičkog inženjerstva
Tehnološko-metalurški fakultet, Beograd, Karnegijeva 4
Tiraž
300 primeraka
ISBN 978-86-82081-27-2
Institut IMS u ovoj godini obeležava 65 godina od osnivanja u današnjem
obliku. Iz svoje bogate istorije navodimo i jubilej navršenih 60 godina primene
prefabrikovanog prednapregnutog skeletnog sistema u zgradarstvu.
Institut za ispitivanje materijala je i ove, veoma uspešne godine, učestvovao u
najznačajnijim projektima u zemlji i regionu. U skladu sa višedecenijskom
tradicijom i ugledom, kao i širokim spektrom usluga koje pružamo, bili smo
angažovani na kontroli i nadzoru, projektovanju, ispitivanjima i istraživanjima
građevinskih i mašinskih objekata i konstrukcija, materijala i proizvoda, na
geotehničkim istražnim radovima, kao i primeni različitih tehnologija i sistema
razvijenih u Institutu IMS.
Kao najznačajnije, izdvajamo nastavak rada na koridorima X i XI, na obnovi i
izgradnji putnih objekata duž autoputeva i magistralnih i regionalnih puteva u
Srbiji, na revitalizaciji HE Đerdap 1 u Kostolcu i na drugim hidro i termo-
elektranama, sanaciju brojnih klizišta, primenu sistema prednaprezanja i druge
specijalističke inženjerske usluge.
Nastavljeno je učešće naših saradnika na realizaciji sedam projekata
tehnološkog razvoja, jedog projekta integralnih i interdisciplinarnih
istraživanja i četiri projekta iz programa osnovnih istraživanja.
I ove godine Institut IMS može da se pohvali rastom broja istraživača izabranih
u naučna zvanja i doktorskim disertacijama koje su odbranile naše mlade
kolege. Priloženi pregled apstrakata svedoči o održanom kontinuitetu
objavljivanja naučnih radova na uglednim skupovima i u istaknutim
publikacijama.
Urednici
Pregled naučnih i stručnih rezultata u 2017. godini 1
SADRŽAJ
REZULTATI NAUČNO-ISTRAŽIVAČKOG RADA .................................. 5
T 152 KOMPOZITNI MATERIJALI ............................................................... 7
Tematski zbornik vodećeg međunarodnog značaja (M13) .................................. 8
Rad u vrhunskom međunarodnom časopisu izuzetnih vrednosti (M21A) ........ 10
Rad u istaknutom međunarodnom časopisu (M22) ........................................... 15
Rad u međunarodnom časopisu (M23).............................................................. 19
Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 20
Saopštenje sa međunarodnog skupa štampano u izvodu (M34) ........................ 27
Saopštenje sa skupa nacionalnog značaja štampano u celini (M63) ................. 28
T 153 KERAMIČKI I PRAŠKASTI MATERIJALI ....................................... 29
Rad u časopisu međunarodnog značaja verifikovanog posebnom odlukom
(M24) ................................................................................................................. 30
Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 32
T 210 MAŠINSTVO, HIDRAULIKA, VAKUUMSKA TEHNOLOGIJA I
AKUSTIČKI INŽENJERING .......................................................................... 35
Rad u časopisu međunarodnog značaja verifikovanog posebnom odlukom
(M24) ................................................................................................................. 36
Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 39
Rad u vodećem časopisu nacionalnog značaja (M51) ....................................... 42
2 Institut za ispitivanje materijala a.d. Beograd
T 220 GRAĐEVINARSTVO, HIDRAULIKA,
PRIOBALNA TEHNOLOGIJA, MEHANIKA TLA ....................................... 45
Rad u časopisu međunarodnog značaja verifikovanog posebnom odlukom
(M24) ................................................................................................................. 46
Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 47
T 230 VISOKA GRADNJA ............................................................................. 55
Rad u časopisu međunarodnog značaja verifikovanog posebnom odlukom
(M24) ................................................................................................................. 56
Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 58
T 270 TEHNOLOGIJA ŽIVOTNE SREDINE,
KONTROLA ZAGAĐIVANJA ........................................................................ 61
Rad u tematskom zborniku međunarodnog značaja (M14) ............................... 62
Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 63
Saopštenje sa skupa nacionalnog značaja štampano u celini (M63) ................. 65
T350 HEMIJSKA TEHNOLOGIJA I INŽENJERING .................................... 67
Rad u vrhunskom međunarodnom časopisu izuzetnih vrednosti (M21A) ........ 68
Rad u istaknutom međunarodnom časopisu (M22) ........................................... 69
Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 70
Saopštenje sa skupa nacionalnog značaja štampano u celini (M63) ................. 71
T450 TEHNOLOGIJA METALA, METALURGIJA,
PROIZVODI OD METALA ............................................................................. 73
Rad u časopisu međunarodnog značaja verifikovanog posebnom odlukom
(M24) ................................................................................................................. 74
Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 75
Pregled naučnih i stručnih rezultata u 2017. godini 3
Saopštenje sa međunarodnog skupa štampano u izvodu (M34) ........................ 79
Saopštenje sa skupa nacionalnog značaja štampano u celini (M63) ................. 82
T 002 GRAĐEVINSKA TEHNOLOGIJA ...................................................... 85
Rad u časopisu međunarodnog značaja verifikovanog posebnom odlukom
(M24) ................................................................................................................. 86
Saopštenje sa skupa nacionalnog značaja štampano u celini (M63) ................. 87
P420 PETROLOGIJA, MINERALOGIJA, GEOHEMIJA .............................. 89
Saopštenje sa međunarodnog skupa štampano u celini (M33) .......................... 90
Rad u vodećem časopisu nacionalnog značaja (M51) ....................................... 92
DOKTORSKE DISERTACIJE ......................................................................... 93
ORGANIZACIJA STRUČNIH SKUPOVA .................................................... 97
NAUČNI PROJEKTI FINANSIRANI OD STRANE MINISTARSTVA
PROSVETE, NAUKE I TEHNOLOŠKOG RAZVOJA ................................ 101
ODABRANE STRUČNE REFERENCE ................................................... 105
CENTAR ZA MATERIJALE ........................................................................ 107
CENTAR ZA METALE I ENERGETIKU ................................................... 113
CENTAR ZA PUTEVE I GEOTEHNIKU ................................................... 119
CENTAR ZA KONSTRUKCIJE I PREDNAPREZANJE ............................ 127
SERTIFIKACIONO TELO ............................................................................. 141
KONTROLNO TELO ..................................................................................... 143
PT PROVAJDER ............................................................................................ 147
4 Institut za ispitivanje materijala a.d. Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 5
RESULTS
OF SCIENTIFIC RESEARCH
WORK
REZULTATI
NAUČNO-ISTRAŽIVAČKOG
RADA
6 Institut za ispitivanje materijala a.d. Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 7
T 152
COMPOSITE
MATERIALS
T 152
KOMPOZITNI
MATERIJALI
8 Institut za ispitivanje materijala a.d. Beograd
TEMATSKI ZBORNIK VODEĆEG
MEĐUNARODNOG ZNAČAJA (M13)
B. Ilić, A. Mitrović, V. Radonjanin, M. Malešev, M. Zdujić
COMPRESSIVE STRENGTH IMPROVEMENTS OF CEMENT-BASED
COMPOSITES ACHIEVED WITH ADDITIONAL MILLING OF
METAKAOLIN
Calcined Clays for Sustainable Concrete. RILEM Bookseries, Vol. 16,
Springer, Dordrecht, 2017, 212-218.
Kaolin from a Serbian deposit, having a high content of mica and quartz,
disordered kaolinite and a high specific surface area, was used to prepare
metakaolin (MK). The calcination at temperatures of 700 °C or 750 °C for 30 to
180 min resulted in MK having high pozzolanic activity, but also significant
aglomeration of particles. In order to disperse aglomerates, MK was milled,
which resulted in increased pozzolanic activity and reduced particle size. The
effects of MK and additionally milled metakaolin (MKmill) on the composite
strengths and microstructure of the pastes were compared. We prepared and
investigated composites in which ordinary Portland cement (OPC) was replaced
with 10% to 50% of MK or MKmill, as well as the representative samples of
paste for determination of microstructure.
Compressive strengths higher than the control were obtained for composites
having up to 30% of MK and up to 40% of MKmill, respectively. Increase of
composite strengths with MKmill was more pronounced at lower cement
replacement levels (10% and 20%).
Compressive strength of composites containing agglomerated MK were
satisfactory, which suggests that milling of MK, as well as purification of
kaolin, may not be necessary.
Keywords: calcination, metakaolin, milling, cement-based composites.
Pregled naučnih i stručnih rezultata u 2017. godini 9
B. Ilić, V. Radonjanin, M. Malešev, M. Zdujić, A. Mitrović
PROPERTIES OF THE CEMENT-BASED COMPOSITES WITH HIGH
CONTENT OF METAKAOLIN
Calcined Clays for Sustainable Concrete. RILEM Bookseries, Vol. 16,
Springer, Dordrecht, 2017, 219-225.
Environmental concerns and sustainable development require increased
replacement of cement. Most of previous studies have shown that the
compressive strength of cement-based composites is maximized with a 20%
content of metakaolin. We investigated composites prepared by replacing
ordinary Portland Cement (OPC) with 30 to 50% of metakaolin (MK) and
addition of appropriate amount of hydrated lime, which were ordinary cured for
2, 28 or 90 days. Hydration products and microstructure of the pastes were
determined by X-ray diffraction (XRD), differential thermal analysis/thermal
gravimetry (DTA/TG) and mercury intrusion porosimetry (MIP). MK was
produced by calcination of kaolin from a Serbian deposit, which contained a
high level of impurities.
Replacement of OPC with 30% of MK achieved 28 days compressive strength
equivalent to that of the control mix. Higher replacement levels, 40% and 50%,
combined with the addition of hydrated lime, achieved satisfactory relative
strengths of 94% and 87%, respectively. The positive contribution was
particularly pronounced after 90 days for a composite containing 50% of MK.
The results clearly showed a possibility of obtaining composites having
acceptable compressive strength with reduced cement content in accordance
with environmental and sustained development requirements.
Keywords: metakaolin, hydrated lime, cement-based composites, compressive
strength.
10 Institut za ispitivanje materijala a.d. Beograd
RAD U VRHUNSKOM MEĐUNARODNOM
ČASOPISU IZUZETNIH VREDNOSTI (M21A)
B. Ilić, V. Radonjanin, M. Malešev, M. Zdujić, A. Mitrović
STUDY ON THE ADDITION EFFECT OF METAKAOLIN
AND MECHANICALLY ACTIVATED KAOLIN ON CEMENT
STRENGTH AND MICROSTRUCTURE UNDER DIFFERENT
CURING CONDITIONS
Construction and Building Materials, 133, 2017, 243-252.
The effects of thermally (MK) or mechanically activated kaolin (AK) on the
compressive strength of mortars and microstructure of pastes were investigated.
Mortar mixtures, in which 10%, 20% and 30% of ordinary Portland cement
(OPC) was replaced by either MK or AK, were prepared (w/b of 0.5) and
ordinary (age 2, 28 or 90 days) and autoclave cured. Hydration products were
determined by X-ray diffraction (XRD) and differential thermal
analysis/thermal gravimetry (DTA/TG) analysis, while microstructure was
investigated by mercury intrusion porosimetry (MIP).
MK substitution increases the compressive strength of ordinary-cured mortars,
as a result of the higher content of reactive silica that caused more pronounced
pozzolanic reaction, as well as by effective refinement of their pore structure.
Positive effects on the compressive strength could be achieved up to 30%
substitution of OPC by MK. The OPC substitution by AK resulted in lower
strengths of ordinary-cured mortars, compared to both MK mortars and
reference. Higher specific surface area and finer particles of AK were
insufficient to compensate, through filler effect, lower pozzolanic reaction and
additional negative influence of the kaolinite presence. The highest compressive
strength was obtained for mortar with 10% of AK (relative strength of 94%).
In comparison to the reference, autoclaved MK and AK mortars, exhibited
lower compressive strength, as a consequence of increasing the hydrogarnet
formation, instead of tobermorite. The highest strength was achieved for mortar
with 10% of AK.
Keywords: metakaolin, amorphous kaolin, ordinary curing, autoclave curing.
Pregled naučnih i stručnih rezultata u 2017. godini 11
RAD U VRHUNSKOM MEĐUNARODNOM
ČASOPISU (M21)
A. Terzić, D. Radulović, L. Pezo, Lj. Andrić, Lj. Miličić, J. Stojanović, I.
Grigorova
THE EFFECT OF MECHANO-CHEMICAL ACTIVATION
AND SURFACE TREATMENT OF LIMESTONE FILLER
ON THE PROPERTIES OF CONSTRUCTION COMPOSITES
Part B: Composites, No. 117, 2017, 61-73.
The effect of the combined actions of milling and hydrophobization procedures
applied in construction composites synthesis was investigated. The mortars
were prepared with cement (CEM I 42.5) and calcite aggregate complying the
standard 1:3 mix ratio. The limestone filler (10 wt.%) was added to the mixture
upon its mechano-chemical activation in an ultra-centrifugal mill. The
activation variables (milling time, rotor velocity, sieve mesh size) were altered
to achieve the optimal quality of the powder. The treatment was optimized via
chemometric tools. The r2 values (0.955-0.998) of second order polynomial
models accurately predicted the output. Standard score analysis chose the
optimal activation parameters: 4.25 min; 48.58 m/s and 80 μm sieve. The
selected filler and all three aggregate fractions were coated with stearic acid via
dry procedure. The mortar mixes, prepared with uncoated (M1) and coated
(M2) aggregate and filler, were cured for a period of 28 days during which
compressive strength and water absorption were monitored. The dimensional
changes in mortars were estimated via TMA dilatometer measurement. Thermo-
analytical methods (DTA/TGA) were applied in the thermal behavior analysis.
Mineralogical and morphological changes in the structure of hardened
composite were detected by XRD and SEM, respectively. Limestone aggregate
led to lower final compressive strengths in mortar, but it produced an
acid initiated the decrease in water absorption and formation of needle-like
micro-network that filled structural voids reducing the open porosity. The
assessment of the effects of limestone utilization as a filler and as an aggregate
on the mortar performances confirmed that this novel water-repellent composite
is applicable in the structural design.
12 Institut za ispitivanje materijala a.d. Beograd
Keywords: strength, statistical methods/modeling, thermal analysis, electron
microscopy, powder processing.
A. Terzić, L. Pezo, Lj. Andrić
CHEMOMETRIC ASSESSMENT OF MECHANO-CHEMICALLY
ACTIVATED ZEOLITES FOR APPLICATION IN THE
CONSTRUCTION COMPOSITES
Part B: Engineering, No. 109, 2017, 30-44.
Natural zeolites of clinoptilolite type from seven deposits were submitted to
mechano-chemical activation in a Retsch ultra-centrifugal mill. The zeolite
types and activation parameters were altered during the experiment with an aim
to determine the optimal combination that would produce powder with adequate
physico-chemical and microstructural properties for application as a binder
replacement and an ion-exchanger in the construction composites. The effects
of input variables (chemical composition of the samples) and process
parameters (the rotor velocity and the activation period) on the efficiency of
zeolite activation were investigated in terms of dependent parameters such as:
specific surface area, grain size distribution, cation exchange capacity, melting
point, compression strength, shrinking, water absorption and apparent porosity.
Cluster analysis, Principal component analysis and Standard score analysis were
applied in the assessment of the acquired product quality. Artificial neural
networks (ANN) were developed in mathematical modeling of observed
responses. Subsequently the ANN was compared to experimental results and the
developed second order polynomial models. Developed models showed r2
values in the 0.822-0.998 range, meaning that they were able to predict the
observed responses in a wide range of processing parameters. ANN models
performed high prediction accuracy (0.975–0.993) and can be considered as
precise and very useful for response variables prediction. The combination of
the conducted mathematical analyses isolated Z5 zeolite as a preferable type,
and 20000 rpm and 30 min as an optimal activation set of parameters.
Mathematically derived conclusions were confirmed by results of instrumental
analyses (XRD, DTA/TG, SEM).
Keywords: Mechanical properties, analytical modeling, thermal analysis,
powder processing, construction materials.
Pregled naučnih i stručnih rezultata u 2017. godini 13
A. Terzić, L. Pezo, Lj. Andrić, V. Pavlović, V. Mitić
OPTIMIZATION OF BENTONITE CLAY MECHANO-CHEMICAL
ACTIVATION USING ARTIFICIAL NEURAL NETWORK MODELING
Ceramics International, Vol. 43, No. 2, 2017, 2549–2562.
The properties of seven montmorillonite-rich bentonites of different geological
origin were investigated prior and subsequent to mechano-chemical processing
in an ultra-centrifugal mill. The objective of the experiment was altering the
bentonite types and activation parameters in order to determine the optimal
milling conditions that produce material which is physico-mechanically and
microstructurally applicable as a binder replacement and sorbent in the
construction composites. The efficiency of bentonite activation was assessed by
chemometrics and Artificial neural networks mathematical modeling. Principal
component analysis and analysis of variance were used in the observation of the
influence of input variables (bentonite chemical composition) and process
parameters (milling duration, rotor velocity) on the product characteristics:
density, specific surface area, grain size and distribution, cation exchange
capacity, melting point, compressive strength, shrinkage and porosity. When the
ANN models for the observed responses, related to predicted bentonite
characteristics and quality, were compared to experimental results, they
correctly predicted the responses. The processed data also adequately fitted to
the regression second order polynomial models. The SOP models, which
showed r2 values from 0.357 to 0.948, and were able to predict the observed
responses in a wide range of processing parameters, while ANN models
performed high prediction accuracy (0.776–0.901) and can be considered as
precise for response variables prediction. The combination of the conducted
mathematical analyses showed that that increase/decrease in output values was
stabilized after 30 min of activation. Mathematically attained interpretations
were correlated with the results of the instrumental analyses (XRD, DTA/TG,
SEM) to confirm the adoption of B6 bentonite as a preferable type and 30 min
as an optimal milling time for acquiring quality of clay powder that will be used
in structural and thermal applications.
Keywords: Milling, composites, electron microscopy, chemical, mechanical
and thermal properties, clays, structural and thermal applications.
14 Institut za ispitivanje materijala a.d. Beograd
A. Terzić, N. Obradović, J. Stojanović, V. Pavlović, Lj. Andrić, D. Olćan, A.
Đorđević
INFLUENCE OF DIFFERENT BONDING AND FLUXING AGENTS ON
THE SINTERING BEHAVIOR AND DIELECTRIC PROPERTIES OF
STEATITE CERAMIC MATERIALS
Ceramics International, Vol. 43, No. 16, 2017, 13264-13275.
The focus of the study was on providing insights into interconnections between
sintering and development of the crystalline microstructure, and consequently
variations in dielectric behavior of four steatites fabricated from a low-cost raw
material, i.e. talc. The changes, induced by the alternations of the binders
(bentonite, kaolin clay) and fluxing agents (BaCO3, feldspar), were monitored
-
re-crystallization of the investigated structures were accomplished. The critical
points in the synthesis of steatite materials were assessed by instrumental
analyses. Crystallinity changes and mineral phase transition during sintering
were monitored by X-ray diffraction technique. Microstructural visualization of
the samples and the spatial arrangements of individual chemical elements were
achieved via scanning electron microscopy accompanied with EDS mapping.
The thermal stability was observed on the green mixtures using differential
thermal and thermo gravimetric analyses. Electrical measurements recorded
variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of
the sintering temperature. The investigation highlighted critical design points, as
well as the optimal combinations of the raw materials for production of the
steatite ceramics for advanced electrical engineering applications.
Keywords: sintering, electron microscopy, x-ray methods, microstructure-final,
dielectric properties, mgo; insulators.
Pregled naučnih i stručnih rezultata u 2017. godini 15
RAD U ISTAKNUTOM MEĐUNARODNOM
ČASOPISU (M22)
A. Terzić, N. Đorđević, M. Mitrić, S. Marković, K. Đorđević, V. Pavlović
SINTERING OF FLY ASH BASED COMPOSITES WITH ZEOLITE
AND BENTONITE ADDITION FOR APPLICATION IN
CONSTRUCTION MATERIALS
Science of Sintering, Vol. 49, No. 1, 2017, 23-37.
Due to pozzolanic characteristics, fly ash is commonly used as a cement
replacement in construction composites. Addition of natural clays with sorption
ability (i.e. zeolite and bentonite) in to the fly ash based construction materials
is of both scientific and industrial interest. Namely, due to the application of
sorptive clay minerals, it is possible to immobilize toxic heavy metals from the
composite structure. The thermal compatibility of fly ash and zeolite, as well as
fly ash and bentonite, within the composite was observed during sintering
procedure. The starting components were used in 1:1 ratio and they were
applied without additional mechanical treatment. The used compaction pressure
for the tablets was 2 t·cm-2. The sintering process was conducted at 1000ºC and
1200ºC for two hours in the air atmosphere. The mineralogical phase
composition of the non-treated and sintered samples was analyzed using X-ray
diffraction method. Scanning electron microscopy was applied in the analysis of
the microstructure of starting and sintered samples. The thermal behavior was
observed via DTA method. The influence of temperature on the properties of fly
ash-zeolite and fly ash-bentonite composites was investigated.
Keywords: sintering, thermal behavior, density, dta, xrd, sem, construction
composite.
16 Institut za ispitivanje materijala a.d. Beograd
D. Radulović, A. Terzić, L. Pezo, Lj. Andrić, I. Grigorova
THE CHEMOMETRIC STUDY OF LIMESTONE PHYSICO-
CHEMICAL PROPERTIES AND THERMAL BEHAVIOR FOR
APPLICATION IN CONSTRUCTION COMPOSITES
Science of Sintering, Vol. 49, No. 3, 2017, 247-261.
The limestone, as an economically sustainable and easily available basic raw
material, is frequently utilized in the building industry for resolving of the
environmental protection issues. The limestone is incorporated in a
cementitious system either by grinding with cement clinker, or by blending with
the binder during concrete production. The employing of powdery limestone as
partial cement replacement gives the construction composites with properties
comparable to that of conventional concrete. The study of limestone thermal
behavior and its chemistry is crucial for the prognosis of the designed
composites properties. In this work, the instrumental techniques (atomic
emission spectroscopy, differential thermal and thermo-gravimetric analysis,
Fourier transform infrared spectroscopy) and the Principal component analysis
were employed to discriminate and classify 22 limestone types. The PCA
statistical method, as a means of spectra and experimental data fingerprinting,
grouped the samples in a multi-dimensional factor space producing four
graphical prognosis - one for each instrumental method. DTA/TG peak values
varied the most in a short range between 830-870 °C, while FTIR spectra
showed the highest diversity in the 867-887 cm-1 and 1237-1647 cm-1 ranges.
This research was governed by an idea to reveal whether it is possible to
differentiate various limestone types and to predict the possibility of their
employment in construction composites on the basis of the results of
instrumental and mathematical analyses.
Keywords: thermal behavior, chemical analysis, microstructure, FTIR,
DTA/TG, SEM, binder, filler.
Pregled naučnih i stručnih rezultata u 2017. godini 17
D. Radulović, D. Božović, A. Terzić, M. Trumić, V. Simić, Lj. Andrić
A KINETIC STUDY OF LIMESTONE DRY MICRONIZATION IN
ULTRA-CENTRIFUGAL MILL WITH PERIPHERAL COMMINUTING
PATH
Journal of Ceramic Science and Technology, Vol. 8, No. 2, 2017, 295-304.
Fine grinded (i.e. micronized) limestone has a wide application in the
production of the new materials, due to its physico-mechanical and physico-
chemical characteristics. The limestone can be used as a filler, coating and/or
powder in ceramic composites. The effect of the fine micronization depends on
the type of the applied equipment and also on the disintegration process. The
emphasis in this study was placed on the investigation of the kinetics of
limestone dry micronization milling in an ultra-centrifugal mill, of an advanced
construction, with a peripheral comminuting path. The efficiency of the used
ultra-centrifugal mill with a peripheral comminuting path was determined
through a detailed investigation of the limestone dry micronization, which
satisfied all of the requirements for technological parameters as well as all
requests regarding micronized product parameters. On the basis of the
investigation of these parameters and theory of dry micronization conducted in
a mill of advanced construction and with use of the contemporary instrumental
techniques for determination and observation of the most significant physical
and chemical characteristics, the kinetics model was produced to serve as the
basis for quick and effective determination of the micronization quality and
efficiency. In this paper, the results of the grinding in an ultra-centrifugal mill
Retsch ZM-1 were analyzed in order to optimize and automatize the process of
ultra-fine micronization.
Keywords: limestone, fillers for ceramics, mechano-chemical activation,
grinding, optimization.
18 Institut za ispitivanje materijala a.d. Beograd
M. Cocić, B. Matović, M. Pošarac, T. Volkov-Husović, J. Majstorović, V. Tasić,
S. Dević, N. Vušović
THERMAL SHOCK PROPERTIES OF GLASS-CERAMICS
SYNTHESIZED FROM A GLASS FRIT
Science of Sintering, 49, 2, 2017, 139-147.
In this study, the behavior of glass-ceramics synthesized from a glass frit of
FFW (Final Flotation Waste) originated from the RTB Bor Company was
investigated. Thermal shock resistance was monitored in order to assess the
possibility of application of such waste material. Thermal shock of the samples
was conducted using water quench test. Image analysis and ultrasonic
measurements were used as nondestructive methods for quantification of
thermal shock damage at the surface and in the bulk of the specimens. Phase
composition of samples was determined by X-ray powder diffraction (XRPD).
The degradation level of samples was about 43 % after 20 cycles of water
quench tests. The results pointed out that glass-ceramic material exhibited good
thermal shock resistance.
Keywords: final flotation waste(FFW), glass-ceramic, thermal shock, image
analysis, ultrasonic velocity.
Pregled naučnih i stručnih rezultata u 2017. godini 19
RAD U MEĐUNARODNOM ČASOPISU (M23)
K. Janković, N. Šušić, M. Stojanović, D. Bojović, Lj. Lončar
THE INFLUENCE OF TAILINGS AND CEMENT TYPE ON
DURABILITY PROPERTIES OF SELF-COMPACTING CONCRETE
Technical Gazette, Vol. 24, No. 3, 2017, 957-962.
In order to examine the differences in chemical composition and the possibility
of using mine tailings in mortar and concrete production, samples were taken
from the landfill and directly from the production. Tailings test results showed
no pozzolanic activity and that its application in concrete can be only a partial
replacement of aggregate. This paper presents the possibility of using tailings in
self-compacting concrete made with Portland cement and sulphate resistant
cement. Concrete specimens in which the aggregate fraction 0/4 mm was
replaced with 10 and 20 % of tailings were examined. The resistance to freezing
and thawing with and without de-icing salts is used as an indicator of concrete
durability.
Keywords: CEM I, CEM III, durability, self-compacting concrete, tailings.
20 Institut za ispitivanje materijala a.d. Beograd
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U CELINI (M33)
D. Bojović, Lj. Lončar, K. Janković, M. Stojanović
ASSESSMENT OF CONCRETE COMPRESSIVE STRENGTH BY
CONVENTIONAL AND SOFT PROGRAMMING TECHNIQUES
XLIV Symposium on operational research SYM-OP-IS 2017, Zlatibor, 2017,
604-608.
Assessment of concrete compressive strength is an important issues in ready-
mixed concrete industry, especially in proportioning new mixtures and for
quality assurance of the produced concrete. Many parameters influence on
concrete strength in hardened state. The concrete characteristics that have a
significant impact on the strength of concrete is definitely air content. Measure
the porosity of fresh concrete is measured by the amount of entrained air. The
effect of entrained air in concrete on compressive strength investigated by many
authors. On the bases these works we have few equations applicable in practice.
Soft programming techniques especially neural networks and the formation of
databases related to the testing in laboratories for concrete opened up new
approaches in predicting the impact of the quantity of entrained air in concrete
on compressive strength. Neural networks provide a strength assessment by
considering several characteristics of both fresh and hardened concrete.
Keywords: assessment of concrete strength, neural networks, porosity.
I. Despotović, K. Janković
INFLUENCE OF DIFFERENT MINERAL ADDITIVES AND
RECYCLED CONCRETE AGGREGATES ON THE PROPERTIES OF
SELF-COMPACTING CONCRETE IN THE FRESH STATE
2nd International RILEM/COST Conference on Early Age Cracking and
Serviceability in Cement-based Materials and Structures EAC-02, Brussels,
Belgium, 2017, 399-403.
Construction industry uses vast amounts of natural resources, simultaneously
producing significant amounts of construction waste, so that it has a great
Pregled naučnih i stručnih rezultata u 2017. godini 21
impact on the environment. Self-compacting concrete contains a certain
amount of powdered materials – fillers. There are various possibilities of
selecting this component. If we used any of the industrial by-products, such as
fly ash or silica fume, we would solve the problem of depositing these
materials, and thus made concrete ecological material. The research subject
presented in this paper are the properties and technology of self-compacting
concrete in the fresh state, made with various mineral additives: lime, fly ash,
and silica fume, wherein the aggregates used, are both natural and recycled
aggregates, obtained by demolition of retaining wall, whose amount is varied in
the concrete.
Keywords: self-compacting concrete, recycled aggregate, fly ash, silica fume,
lime.
K Janković, M.Stojanović, Lj. Lončar, D. Bojović, Lj. Miličić
INFLUENCE AND THE POSSIBILITY OF TAILINGS FROM THE
COPPER MINE RADOVIŠ ON THE PROPERTIES OF SCC
CONCRETE
17th International symposium of MASE, Ohrid, Macedonia, 2017, 710-714.
Tailings that pose a threat to the environment are created during the flotation of
ore from the mines. Samples were taken from the tailings from the copper mine
Rudovis in Macedonia. The testing of the chemical composition was performed,
as well as the possibility of application in the production of concrete. Testing
has shown that tailings have no pozzolanic properties. Physical - mechanical
properties were examined on the samples of self-compacting concrete prepared
with the addition of tailings, as a partial replacement of the fraction 0/4mm (in
quantity of 10 or 20%). Based on the obtained results it can be concluded that
the application of up to 20% of the tailings as a substitute for the fine fraction of
aggregates is justified.
Keywords: tailing, self-compacting concrete, compressive strength.
22 Institut za ispitivanje materijala a.d. Beograd
K. Đoković, S. Tošović, K. Janković, M. Stojanović
DETERMINING THE DYNAMIC MODULUS OF ELASTICITY OF
CEMENT STABILIZED MIXTURES FOR THE NEEDS OF THE
DESIGN OF THE PAVEMENT STRUCTURE
27th international symposium on research and application of contemporary
achievements in construction materials and structures, Vršac, 2017, 115-120.
Due to the nature of the dynamic loading of the pavement structure it is of
particular importance to determine the dynamic modulus of elasticity. In
addition to being used in designing a pavement structure, a dynamic modulus of
elasticity can also be used for the classification of stabilized mixtures. This
parameter can be obtained on the basis of the empirical dependence between the
modulus of elasticity and the compressive strength at 28 days and the
measurement of the ultrasound method. The paper presents the results of testing
the dynamic modulus of elasticity with cement of stabilized mixtures prepared
with different part of recycled asphalt and crushed stone aggregate. Also, the
tests were performed with a different percentage of cement 3, 5 and 7%
compared to the dry mass of the material.
Keywords: cement stabilization, dynamic modulus of elasticity, ultrasound
method.
K. Janković, Lj. Lončar, L. Antić, D. Bojović, M. Stojanović
THE INFLUENCE OF THE METHOD OF ADJUSTMENT OF
CONCRETE SPECIMENS ON COMPRESSIVE STRENGTH
5th International Conference Contemporary Achievements in Civil Engineering
2017 Subotica, 2017, 461-465.
The samples for subsequent testing of compressive strength are obtained from
cores drilled from the elements made of hardened concrete by drilling. Samples
must meet the requirements of applicable standards in terms of dimensions and
tolerance, and are thus prepared by cutting and grinding or by applying a
leveling layer. Five series of samples (cylinders) whose ends were prepared in
various ways by grinding or capping by: sulfur, sulfur and quartz sand,
aluminous cement quick-setting mortar and epoxy adhesive were tested. Before
Pregled naučnih i stručnih rezultata u 2017. godini 23
that, compressive strengths of the materials used for making leveling layers
were tested. Sample preparation by grinding is recommended.
Keywords: concrete cores, compressive strength, preparation of sample ends.
K. Janković, M. Stojanović , D. Bojović, Lj. Lončar, L. Antić
EFFECTS OF DIFFERENT TYPES OF AIR ENTRAINING
ADMIXTURES ON FREEZE/THAW RESISTANCE
27th international symposium on research and application of contemporary
achievements in construction materials and structures, Vršac, 2017, 121-128.
Some concrete structures are often exposed to external influences in
exploitation. The effect of frost has significant influence on the durability of the
concrete structures as it can lead to the destruction of the structure of concrete.
Concrete exposed to cold must be protected by aerating. The protection is
achieved by adding chemical admixtures that entrain air into fresh concrete. The
design of concrete mixtures was carried out in accordance with the
recommendations of national and European norms (w/c ≤ 0.45, minimum
strength class C 30/37, cement content ≥ 340 kg/m3, minimum content of
entrained air - 4.0%). Three concrete mixtures with various types of air
entraining were made. Frost resistance testing was performed according to
SRPS U.M1.016. The total number of freezing and thawing cycles was 250.
Keywords: concrete durability, air entraining admixture, freeze/thaw resistance.
K. Janković, M. Stojanović , D. Bojović, Lj. Lončar, L. Antić
INFLUENCE OF STEEL FIBER ON PROPERTIES OF HIGH
STRENGTH CONCRETE
5th International Congress Engineering, Environment and Materials in
Processing Industry, Jahorina, BiH, 2017, 564-573.
The development of modern chemical and mineral admixtures over the past two
decades has enabled the development of composites with very high mechanical
properties. By adding steel fibers to concrete a very ductile composite material
is obtained. Three types of high strength concrete by adding 0, 2 and 4% of steel
fibers were prepared. Properties of concrete: compressive strength, splitting
24 Institut za ispitivanje materijala a.d. Beograd
tensile strength and flextural strength were tested. In this study, the best
properties of high strength concrete with the application of 4% of steel fibers
were obtained.
Keywords: hpc, steel fibers, compressive strength and tensile strength.
K. Janković, M. Stojanović , D. Bojović, Lj. Lončar, L. Antić
THE EFFECT OF DIFFERENT AIR ENTRAINING ADMIXTURES ON
FREEZE-THAW SCALING RESISTANCE OF CONCRETE
2nd International RILEM/COST Conference on Early Age Cracking and
Serviceability in Cement-based Materials and Structures EAC-02, Brussels,
Belgium, 2017, 547-552.
In order to obtain concrete resistant to frost and/or frost and de-icing salts it is
necessary to use air entraining admixtures. The application of this type of
admixtures affects the concrete structure, as well as the other properties of
concrete. To determine the effect of different types of air entraining admixtures,
four concrete mixtures were prepared including: reference concrete and three
with added air entraining admixtures. The results of testing the properties of
fresh concrete as well as mechanical and physical properties of hardened
concrete (strength, bulk density, resistance of concrete to frost or de-icing salts,
pore spacing factor) were compared.
Keywords: air entraining admixtures, frost and salt, spacing factor
K. Janković, M. Stojanović , D. Bojović, Lj. Lončar, L. Antić
THE INFLUENCE OF AIR ENTRAINING ADMIXTURES ON
CONCRETE PROPERTIES
5th International Conference Contemporary Achievements in Civil Engineering
2017, Subotica, 2017, 467-472.
Concrete exposed to frost and de-icing salts have to be protected by aeration.
This is achieved by adding chemical additives to draw air into the fresh
concrete. These concretes have resulted in a decrease of compressive strength of
concrete by 5% for each percent of entrained air in comparison to the
conventional concrete. Three concrete mixtures with different types of air
Pregled naučnih i stručnih rezultata u 2017. godini 25
entraining admixtures was done were made. A testing of properties of fresh
concrete and the influence of different types of air entraining admixtures to
fresh concrete was conducted. The results obtained in the fresh concrete as well
as the compressive strength at the age of 3, 7 and 28 days are shown.
Keywords: air entraining admixtures, fresh concrete, compressive strength.
K. Janković, M. Stojanović, Lj. Lončar, D. Bojović, Lj. Miličić
INFLUENCE OF THE WASTE FROM THE PROCESS OF STEEL
ALLOYING AS A PARTIAL REPLACEMENT OF AGGREGATE ON
CONCRETE PROPERTIES
17th International symposium of MASE, Ohrid, Macedonia, 2017, 715-720.
In the metallurgical industry, in the production of various alloys of steel, waste
material that has no further application is produced. Samples from the waste
dumps from the Skopski Leguri – Skopje, Macedonia were taken. Testing of
chemical composition, as well as the possibility of the application of waste
material obtained during alloying of metals in the production of concrete, was
performed. Studies have shown that the waste material has no pozzolanic
properties. For this reason, this material cannot be used as a partial replacement
for cement. On the concrete samples prepared with the addition of tailings, as a
partial replacement of the fraction 0/4mm (in the amount of 10 or 20%),
physical - mechanical properties were examined. Based on the obtained results,
it can be concluded that the application of up to 10% of the waste material is
justified.
Keywords: waste from the steel alloying process, aggregate, concrete.
M. Štefanči., R. Milači., A. Mladenovič, K. Janković, M. Stojanović, J. Turk,
A. Šajna, A. Mauko Pranjić
LEACHING TESTS OF LEAD AND ZINC FROM MINE TAILINGS OF
THE MEŽICA, SLOVENIA AND RUDNIK, SERBIA MINING AREAS
27th international symposium on research and application of contemporary
achievements in construction materials and structures, Vršac, 2017, 97-106
26 Institut za ispitivanje materijala a.d. Beograd
Lead and zinc mine tailings from the Kavšak lead and zinc mining waste
disposal site, located in the Mežica Valley in Slovenia, and from the still
operative mining area near the village of Rudnik in central Serbia, were
characterisedin order to determine their suitability as a replacement material for
fine aggregate in concrete. In both cases the mineralogical diversity of the
gangue, which included lead- and zinc-bearing minerals, was first investigated
by means of qualitative phase analyses, which confirmed the presence of these
minerals within the detection limits of this method. In the leaching studies
which followed, not only demineralised water was used as a leachant (as
prescribed in the test method according to the standard SIST EN 1744-3) but
also a highly-alkaline synthetic pore solution which is closer to that in real
cement systems. It was found that the measured concentrations of lead and zinc
were, by a factor of 70 and 50, respectively, higher in the leachate of the tailings
from the Kavšak waste disposal site than in those from the flotation plant at
Rudnik.
Keywords: leaching test, tailings,lead and zinc mining waste.
Pregled naučnih i stručnih rezultata u 2017. godini 27
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U IZVODU (M34)
D. Olćan, N. Obradović, S. Filipović, A. Terzić, V.r Pavlović, M. Kachlik, K.
Maca, A. Đorđević
ASSESSING ELECTRICAL PROPERTIES OF CERAMIC SAMPLES
Advanced Ceramic and Application VI – New frontiers in multifunctional
material science and processing, Belgrade, 2017, 51.
We present an overview of electromagnetic numerical techniques and
measurement apparatus that have been used for assessing electrical properties of
ceramic samples. The complex permittivity of the ceramics is typically the first
electromagnetic property of interest. In the measurement approach that we use,
ceramic samples, in the shape of pills with metalized faces, are placed in either
a proprietary coaxial chamber or in an open fixture. The scattering parameter
(reflection coefficient) is measured using a network analyzer. For the
deembedding of the complex permittivity of a sample one needs precise
electromagnetic simulations, including detailed models of the chamber or the
open fixture. For lower and intermediate frequencies we use a numerical
technique for electrostatic analysis, based on the method of moments with
Galerkin testing. We create a database that is used afterwards for evaluation of
the complex permittivity practically in real time. For higher frequencies, a full
electrodynamic model of the chamber is developed with WIPL-D software. For
all our deembedding techniques, we have also developed a detailed model of
losses in the SMA coaxial connectors, which is essential for a precise evaluation
of the imaginary part of the complex permittivity for low-loss dielectrics. We
present results of several measurements in order to illustrate the used techniques
Keywords: electrical properties, ceramics.
28 Institut za ispitivanje materijala a.d. Beograd
SAOPŠTENJE SA SKUPA NACIONALNOG
ZNAČAJA ŠTAMPANO U CELINI (M63)
Z. Radojević, Lj. Miličić, A. Terzić, M. Vasić
ISPITIVANJE MOGUĆNOSTI PRIMENE KERAMIČKIH GLINA SA
LEŽIŠTA „BREZACI“ U PROIZVODNJI PLOČICA
XXVII međunarodni simpozijum o istraživanjima i primeni savremenih
dostugnuća u građevinarstvu u oblasti materijala i konstrukcija, Vršac, 2017,
67-75.
Mineralne sirovine kao potencijalni resursi,čine okosnicu razvoja nacionalne
ekonomije svake zemlje, a njihovu valorizaciju treba svrstati u njene strateške
planove razvoja.U ovom radu su prikazani rezultati ispitivanja uzoraka
keramičkih glina sa ležišta „Brezaci“ i ocena njihove primenljivosti. Ispitivanja
su obuhvatila: hemijsku, mineralošku i termičku identifikaciju (vatrostalnost,
temperatura klinkerovanja i sinterovanja). Ispitivane su i tehnološke
karakteristike: plastičnost, svojstva u sušenju (skupljanje, bigot kriva i
čvrstoća). Uzorci su pečeni na četri temperature u oblasti 1000 – 12500C. Na
pečenim uzorcima ispitivano je: skupljanje, upijanje vode, čvrstoća na lom i
boja. Na osnovu dobijenih rezultata data je ocena prmenljivosti ispitivanih
keramičkih glina u proizvodnji pločica i u drugim privrednim granama.
Ključne reči: keramičke gline, keramičke pločice, vatrostalnost, sinterovanje.
Pregled naučnih i stručnih rezultata u 2017. godini 29
T 153
CERAMIC MATERIALS
AND POWDERS
T 153
KERAMIČKI
I PRAŠKASTI MATERIJALI
30 Institut za ispitivanje materijala a.d. Beograd
RAD U ČASOPISU MEĐUNARODNOG
ZNAČAJA VERIFIKOVANOG POSEBNOM
ODLUKOM (M24)
S. Dević, M. Cocić
SUBMERGE ENTRY NOZZLES BASED ON ALUMO-GRAPHITE
REFRACTORY MATERIAL IN THE PROCESS OF CONTINUOUS
STEEL CASTING
Materials Protection, 58, 2, 2017, 151-157.
Submerge entry Nozzles are parts made of refractory material and are utilized
for steel casting in the continuous casting process. Steel is cast from the tundish
into the crystallizer through the Submerge entry Nozzle (SEN). The role of the
SEN is to protect steel from oxidation and to provide a uniform flow of steel
during casting[1][2]. SEN are manufactured from refractory material with
diverse composition. At the beginning of application of SEN, when introducing
the continuous casting process, white SEN, based on melted quartz, were
utilized.White SEN were utilized primarily for casting one steel grade. Alumo-
graphite SEN are another type of SEN that are utilized for casting all steel
grades. They are sensitive to thermal shocks, so before use they must be heated
in special heating facilities at the temperature ranging from 1000°C-1100°C.
Alumo-graphite SEN are manufactured by special isostatic pressing process.
These are used successfully today. During casting, the SEN are in contact with
steel on the internal side of the wall, and on the external side of the wall with
casting powder and slag formed in the crystallizer. Internal erosion sometimes
appears at the contact with steel on the internal side of the wall of alumo-
graphite SEN, but build-up is formed more often. The SEN erosion occurs on
the external side of the SEN wall, which originated due to the effect of casting
powder and slag. All three phenomena affect SEN durability. External erosion
reduces the thickness of SEN wall and causes SEN cracking. On the other hand,
the formed build-up reduces the diameter of SEN orifice (aperture) leading to
reduction of steel flow and excluding the SEN from the exploitation process.
Depending on the steel grade being cast, mineralogical composition of casting
powder, quality of alumo-graphite SEN, SEN design, technological parameters
and technological process itself, the internal, external erosion or build-up will
Pregled naučnih i stručnih rezultata u 2017. godini 31
appear on the internal wall of the alumo-graphite SEN. Each of enumerated
phenomena affects the lifetime of the alumographite SEN.This scientific paper
aimed at presenting and explaining the phenomena and causes of reduced
lifetime of the alumo-graphite SEN on a few characteristic examples.
Key words: SEN (submerge entry nozzle), alumo-graphite material, erosion,
build-up.
32 Institut za ispitivanje materijala a.d. Beograd
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U CELINI (M33)
M. Cocić, M. Logar, V. Tasić, S. Dević, S. Cocić
THE POSSIBILITY OF USING THE FINAL FLOTATION WASTE FOR
OBTAINING THE GLASS-CERAMICS
XII International Symposium Recycling Technologies and Sustainable
Development, Bor, 2017, 74-81.
To find the optimal composition and conditions of crystallisation for obtaining
the applicable materials, thermal properties of the following materials were
tested: final flotation waste (FFW) (originating from the RTB Bor Company,
Serbia), basalt and tuff, and then, a mixture of FFW with basalt (10 % -T10,
20% - T20 and 40% -T40) and the mixture of FFW with tuff (20% - P20 and
40% - P40). The glass-ceramics obtained by sintering of the FFW, the mixture
of FFW with basalt (T20 and T40) and the mixture of FFW with truff (P20 and
P40) were characterized. The glass-ceramics sintered from the pure FFW
(1080°C/36h) has good mechanical properties, such as high propagation speed
(4500 m/s) and hardness (10800 MPa), as well as very good thermal stability.
The glass-ceramics obtained from mixtures shows weaker mechanical
properties compared to that obtained from the pure FFW. The mixtures of the
FFW with tuff have a significantly lower bulk density compared to other
obtained glass-ceramics. Our results indicate that the FFW can be applied as a
basis for obtaining the construction materials.
Keywords: FFW, sintering, thermal properties, glass-ceramics, mechanical
properties.
M. Cocić, V. Tasić, S. Dević
DETERMINATION OF THERMAL SHOCK RESISTANCE OF GLASS
FRIT USING NONDESTRUCTIVE TEST METHODS
XXV International Conference ECOLOGICAL TRUTH Eco-Ist' 17, Vrnjačka
Banja, 2017, 242-250.
In this study, the behavior of glass-ceramics synthesized a glass frit FFW (final
flotation waste) originated from the RTB Bor company, was investigated.
Pregled naučnih i stručnih rezultata u 2017. godini 33
Thermal shock resistance was monitored, in order to assess the possibility of
application of such waste material. Thermal shock of the samples was
conducted using water quench test. Ultrasonic measurements ware used as a
nondestructive quantification of thermal shock damage in the bulk of the
specimens. Phase composition was determined by X-ray powder diffraction
analysis. Results of the thermal shock stability testing indicated that level of
destruction of sample is about 43% for 20 cycles of water quench test.
Keywords: Final flotation waste (FFW), glass-ceramic, thermal shock,
ultrasonic velocity.
S. Dević, M. Cocić
MINERALOGICAL COMPOSITION OF THE SEN INTERNAL BUILD-
UP
5th International Congress Engineering, Enviroment and Materials in Processing
Industry, Jahorina, BIH, 2017, 539-546.
The mineralogical composition of the internal build-up of the SEN (submerge
entry nozzle) is presented in this paper, which is formed in the continuous steel
casting process. Two methods were used for determining the mineralogical
composition of build-up: optical microscopy and X-ray diffraction method.
Optical testing was carried out on the polarization microscope for transmitted
light - Jena pole (immersion preparations), and XRD was performed on the X-
ray diffractometer Kristaloslex 810. The spectrometer ARL 9800 IX-P was used
for determining the changes in chemical composition of the SEN wall, by
zones, namely, by the X-ray fluorescent spectrometry method. SEN is a part of
the nozzle set that is used for continuous steel casting. It is manufactured from
the refractory material based on the alumino-graphite, by the isostatic pressing
method. The basic role of the SEN, in continuous steel casting, is providing a
uniform steel flow from the tundish into the crystallizer and protecting steel
from oxidation. During the casting process, the internal side of the SEN wall is
in contact with steel. Build-up is often formed on the internal side, reducing the
SEN orifice, steel flow and lifetime of the nozzles. The formation of build-up
on the internal side of the SEN is caused by the accumulation of Al2O3 and
reactions of Al2O3, that can occur as the steel deoxidation product, as the
product of the secondary steel oxidation by means of the air (reoxidation),
34 Institut za ispitivanje materijala a.d. Beograd
through the formation of the crystallization core, induced by temperature
decrease near the SEN surface, but also as the product of reaction between Al in
molten steel and SiO2 from the SEN refractory material. The processes
occurring at the steel casting temperature (1550-1556°C) enable the formation
of gas sub-oxides Al2O and SiO in the refractory material itself, diffunding
through the nozzle wall toward the channel surface, and then to the steel melt.
On the surface of phase limits and directly with it goes on the oxidation reaction
of gas sub-oxides with oxygen from the steel and the formation of Al2O3 .The
formation of internal build-up is often the result of combination of the stated
processes. The internal build-up, presented in this paper, has been formed not
only by the effect of steel deoxidation and reoxidation process, but also due to
the appearance of internal erosion and diffusion that was going on in the SEN
refractory material. For the presentation of mineralogical composition of the
internal build-up of SEN, five build-ups were selected, formed at continuous
casting of two steel grades. Three build-ups were formed at carbon steel casting
(A series) and two build-ups formed at casting of the aluminum killed steel (B
series).
The paper contributes to better understanding of the phenomenon of build-up
formation, because it shows the results of five tested internal build-ups of the
SEN, changes in the contact zone of the SEN wall with steel, but also the
conditions and some technological parameters that dominated in the process
during the formation of the same.
Keywords: SEN (submerge entry nozzle), refractory material, steel, build-up.
Pregled naučnih i stručnih rezultata u 2017. godini 35
T 210
MECHANICAL
ENGINEERING,
HYDRAULICS,
VACUUM TECHNOLOGY,
VIBRATION AND ACOUSTIC
ENGINEERING
T 210
MAŠINSTVO,
HIDRAULIKA,
VAKUUMSKA
TEHNOLOGIJA
I AKUSTIČKI
INŽENJERING
36 Institut za ispitivanje materijala a.d. Beograd
RAD U ČASOPISU MEĐUNARODNOG
ZNAČAJA VERIFIKOVANOG POSEBNOM
ODLUKOM (M24)
M. Arsić, S. Bošnjak, V. Grabulov, M. Mladenović, Z. Savić
USE OF NON-DESTRUCTIVE TESTS FOR THE ASSESSMENT OF
INTEGRITY AND SERVICE LIFE OF HYDRO-MECHANICAL
EQUIPMENT
Selected peer reviewed papers from the 12th International Conference on
Structual Integrity of Welded Structures (ISCS17), 2017, Timisoara, will be
published in Advanced Materials Research, 2017.
Technical diagnostics of hydromechanical equipment is based on testing
procedures including the history of the exploitation with expert knowledge of
structures and operating conditions, as well as, on the analysis of results
performed by experts with appropriate experience and knowledge in design,
exploitation, maintenance, reliability, fracture mechanics etc. Degradation of
properties of the material and/or welded joints of hydro-mechanical equipment
is being caused by the simultaneous influence of a large number of factors. First
of all, it is thought of technological, metallurgical, structural and conditions of
exploitation. In this paper, the selection of methodology for the rehabilitation of
hydro-mechanical equipment is presented based on the previously conducted
assessment of state of equipment using the nondestructive testing methods.
Repair welding, repair of damaged surfaces by cold metallization, corrections of
existing structural solutions of metallic components in order to improve their
technical characteristics and extend the service life are presented.
Keywords: hydro turbine, non-destructive testing, degradation of material,
structural integrity.
Pregled naučnih i stručnih rezultata u 2017. godini 37
M. Dojčinović, M. Arsić, S. Bošnjak, A. Murariu, Z. Malešević
CAVITATION RESISTANCE OF TURBINE RUNNER BLADES AT
THE HYDRO POWER PLANT ‘DJERDAP'
Structural Integrity and Life, Vol. 17, No. 1, 2017, 55-60.
Hydro power plants are interested in developing means of protection of turbine
and hydromechanical equipment from undesirable occurrences, such as
degradation of parent material and/or weld metal of parts and structures, caused
by stresses and unpredictable influence of vibrations, fatigue, corrosion, erosion
and cavitation. Results of tests that refer to the cavitation resistance of turbine
runner blades made of cast steel 08X15H4ДМЛ, in accordance with GOST
standard are presented in this paper. For the testing of cavitation resistance
ultrasonic vibratory test method was used (with the stationary sample), for
which it is necessary to measure the mass loss during specified time intervals,
while the cavitation resistance of material is being defined taking into account
the incubation period and cavitation rate. Scanning electron microscope was
carried out to study the morphology of sample damage due to cavitation. The
obtained results showed that the tested steel has a good cavitation resistance,
and that fatigue is the main failure mechanism.
Keywords: turbine, runner blade, cavitation damage, cavitation rate, incubation
period.
V. Lazić, D. Arsić, R. R. Nikolić, M. Arsić, B. Hadzima
SELECTING THE LOW ALLOY-TEMPERED STEEL FOR
MANUFACTURING THE HIGHLY LOADED RESPONSIBLE PARTS
Communication, Vol. 19, No. 3, 2017, 119-114.
The selecting procedure of the optimal material for manufacturing the highly
loaded responsible parts for military applications is presented in this paper. The
considered part is in exploitation subjected to complex compressive-impact
loading and cyclically to high temperatures, as well. The proper selection of
material can be done exclusively based on the theoretical and experimental
analysis of properties of the steel in question. The theoretical and experimental
selecting of adequate steel for manufacturing such parts is done based on
requirements arising from their working conditions. Based on the available data
for various steels, chemical composition, mechanical and technological
38 Institut za ispitivanje materijala a.d. Beograd
properties, available CCT diagram, the optimal steel was selected for the given
working conditions. After the selection of the material, experimental
investigations on specially prepared material samples were conducted. The real
chemical composition of material was established, its most important
mechanical properties were determined, the hardness was measured and the
microstructure was determined, as well. After the conducted theoretical and
experimental investigations, the responsible machine part was manufactured
from the selected material by forging. Then, the mechanical and heat processing
was executed, after which the part was tested in the real working conditions.
Based on investigations of part'sbehavior in the real working conditions, it was
concluded that the selection of the material was adequate.
Keywords: heat resisting steel, heat affected zone, instrumented Charpy test,
impact toughness.
Pregled naučnih i stručnih rezultata u 2017. godini 39
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U CELINI (M33)
M. Arsić, S. Bošnjak, M. Mladenović, Z. Malešević, Z. Savić
INTEGRITY OF BEAM BRACES AND THREADED SPINDLE FOR
CONJOINT OPERATION OF TWO 5 MN BRIDGE CRANES
9th Triennial International Conference Heavy Machinery HM 2017, Zlatibor,
2017, A45-A52.
The beam connects two bridge cranes with the overall lifting capacity of 500 t
(2x250 t) and enables their simultaneous conjoint operation during the
rehabilitation or major overhaul of hydroelectric generating set equipment at the
hydro power plant ''Djerdap 2''. Two braces are being installed instead of two
hooks when that situation occurs. Threaded spindle is loaded with 500 t (5 MN),
while braces are loaded with 250 t (2.5 MN) each. Integrity of structures is a
relatively new scientific and engineering discipline which in a broader sense
comprises condition analysis, behaviour diagnostics, service life evaluation and
rehabilitation of structures, which means that, beside the usual situation in
which it is necessary to evaluate the integrity of structure when a flaw is
detected by means of non-destructive tests, this discipline also comprises stress
condition analysis for the crackless structure, most often through the use of the
finite element method. That's the way to obtain the precise and detailed
distribution of displacements, deformations and stresses, which enables
determination of weak spots at the structure, even before the initiation of the
crack. Non-destructive tests were performed in order to analyze the current
condition of braces and of the threaded spindle. On the basis of performed
analytical calculations it was determined that their integrity is not threatened,
although some internal non-homogeneities were detected by ultrasonic testing.
Keywords: cranes, ultrasonic testing, braces, threaded spindle, integrity of
structures.
40 Institut za ispitivanje materijala a.d. Beograd
M. Arsić, S. Bošnjak, M. Mladenović, Z. Malešević, Z. Savić
METHODOLOGY FOR THE REPAIR OF DAMAGES THAT
OCCURRED ON THE WELDED JOINTS AT THE BODY OF GUIDE
VANE APPARATUS VANES OF THE VERTICAL KAPLAN TURBINE
8th International Scientific Conference IRMES 2017, Trebinje, BIH, 2017, 359-
364.
Vertical Kaplan turbines, with nominal power of 178 MW and manufactured in
Russia, have been installed in 6 hydroelectric generating units of hydro power
plant ’Djerdap 1’. Experimental tests were carried out by non-destructive
methods in order to determine the turbine condition during the rehabilitation of
the hydro power plant. Lack of root penetration was detected in V40 welded
joints between upper and lower sleeves and bodies of guide vane apparatus
vanes. Height of the lack of root penetration was in the range between 5 and 15
mm, while the allowable height of the lack of root penetration is 3 mm,
according to the technical conditions. The upper sleeves were made of cast steel
25L (in accordance with GOST 977), while lower sleeves were made of steel
forging St 25 (in accordance with standards GOST 1050 for chemical
composition and GOST 8479 for forgings).Methodology for the repair of non-
penetrated welded joints between the sleeves and body of the guide vane
apparatus vane was composed taking into account the results of ultrasonic
testing. By repair methodology it is necessary to, due to the structural solution
and service function of guide vane apparatus vanes, specify a large number of
details, consider them carefully and carry them out in order to improve safety,
because if some of them get overlooked, underestimated or incorrectly
perceived, significant problems in turbine operation may occur.This
methodology refers solely to the repair of damaged welded joints between
sleeves and bodies of guide vane apparatus vanes.
Keywords: sleeve, guide vane apparatus vane, welded joint, lack of root
penetration, repair methodology.
Pregled naučnih i stručnih rezultata u 2017. godini 41
M. Arsić, S. Bošnjak, N. Gnjatović, M. Mladenović, Z. Savić
ASSESSMENT OF INTEGRITY AND SERVICE LIFE OF THE UPPER
RING OF TURBINE RUNNER GUIDE VANE APPARATUS AT HYDRO
POWER PLANT ĐERDAP 1
XXII International Conference on Material handling, constructions and logistics
MHCL’17, Belgrade, 2017, 231-234.
During the rehabilitation of the hydroelectric generating set A6 at hydro power
plant ’Djerdap 1’, state analysis and integrity assessment werecarried out for all
vital components and structures. After the completion of non-destructive and
destructive tests carried out on parent material and welded joints of the structure
of the upper ring of guide vane apparatus as part of vertical Kaplan turbine
runner, it was decided that it should be replaced with a new one, because parent
material and welded joints were degraded beyond repair. Existing upper ring of
guide vane apparatus was made of steel St 3, in accordance with GOST
standard. New upper ring of guide vane apparatus was manufactured through
the use of steel S 235, in accordance with DIN standard. During ultrasonic
testing 6 mm high lack of root penetration was detected at the load carrying
welded joint along the entire circumference of the guide vane apparatus. It
should be noted that there is no possibility of restoring the welded joint,
becausethe occurrence of deformations at the structure has to be avoided. In this
paper the results of the check of load carrying capacity of welded joints are
presented, taking into account all weakened cross-sections.Determination of
load carrying capacity and fatigue strength were carried out in the usual way, as
well as the stress state analysis performed through the use of finite element
method in order to determine the influence of undercuts. Assessment of
integrity and service life of the guide vane apparatus based on the influence of
cracks on stress distribution and fracture mechanics parameters was also carried
out.
Keywords: hydro turbine, upper ring of the guide vane apparatus, welded joint,
crack, integrity assessment.
42 Institut za ispitivanje materijala a.d. Beograd
RAD U VODEĆEM ČASOPISU
NACIONALNOG ZNAČAJA (M51)
M. Arsić, M. Mladenović, Z. Savić, S. Bošnjak, R. Miković
STATE ANALISYS OF THE UPPER RING OF GUIDE VANE
APPARATUS AT HYDRO POWER PLANT DJERDAP 1 CARRIED
OUT THE BASIS OF NON DESTRUCTIVE TESTS
Energija, ekonomija, ekologija, Vol. 19, No. 1-2, 2017, 245-249.
Vertical Kaplan turbines, with nominal power of 176 MW, manufactured in
Russia, have been installed in 6 hydroelectric generating units of hydro power
plant "Djerdap 1". Turbines were designed for the lifetime of 40 years due to
the required structural solution and the inability of performing periodic
inspections and state analyses. Welded structure of the upper ring of guide vane
apparatus is made by welding four segments made of St 3 steel together, in
accordance with standard GOST 977/88. Ring segments were welded by using
submerged arc welding (SAW). During the rehabilitation of turbine A6
nondestructive and destructive tests were performed on parent material and
welded joints in order to carry out the state analysis and estimation of level and
causes of eventual degradation of the structure of the upper ring of guide vane
apparatus at hydro power plant Djerdap 1. This paper comprises results of
magnetic particle tests and ultrasonic tests performed on welded joints. By
ultrasonic testing it was determined that there is a lack of root penetration in
welded joints, as well as lamellar tearing in parent material. Analysis of the
causes of parent metal degradation and occurrence of defects in welded joints of
the upper ring of guide vane apparatus was carried out on the basis of results of
experimental tests.
Keywords: hydro turbine, the upper ring of guide vane apparatus,
nondestructive testing, material degradation, welded joint.
Pregled naučnih i stručnih rezultata u 2017. godini 43
M. Arsić, S. Bošnjak, M. Mladenović, Z. Savić
INTEGRITY EVALUATION FOR THE WELDED STRUCTURE OF
THE BUCKET-WHELL EXCAVATOR THROUGH THE USE OF NON
DESTRUCTIVE TESTING METHODS
Energija, ekonomija, ekologija, Vol. 19, No. 1-2, 2017, 241-244.
Technical diagnostics, when it comes to structures and components of bucket-
wheel excavators, should be based on certain testing procedures, history of their
use under service conditions, as well as on analysis of results obtained by
experts with adequate experience and knowledge regarding the design,
exploitation, maintenance, reliability, fracture mechanics etc. This paper
contains the case where non-destructive tests enabled integrity evaluation for
the welded structure of the bucket-wheel bracket with a flaw within the welded
joint. Bucket-wheel excavator was manufactured by german company
TAKRAF. Integrity of structures is a relatively new scientific and engineering
discipline, which in a wider sense encompasses state analysis and diagnostics of
behaviour and relaxation, service life evaluation and refurbishment of
structures. Beside the common situation in which it is necessary to evaluate the
integrity of a structure when a flaw is detected by NDT methods, this discipline
also encompasses the analysis of stress state. This approach is particularly
important for welded structures subjected to working conditions suitable for
crack initiation, such as fatigue.
Keywords: bucket-wheel excavator, bracket, welded joint, non-destructive
testing, structural integrity.
44 Institut za ispitivanje materijala a.d. Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 45
T 220
CIVIL ENGINEERING,
HYDRAULIC ENGINEERING,
OFFSHORE TECHNOLOGY,
SOIL MECHANICS
T 220
GRAĐEVINARSTVO,
HIDRAULIKA,
PRIOBALNA
TEHNOLOGIJA,
MEHANIKA TLA
46 Institut za ispitivanje materijala a.d. Beograd
RAD U ČASOPISU MEĐUNARODNOG
ZNAČAJA VERIFIKOVANOG POSEBNOM
ODLUKOM (M24)
M. Ćosić, B. Folić, R. Folić
FRAGILITY AND RELIABILITY ANALYSES OF SOIL - PILE -
BRIDGE PIER INTERACTION
Facta Universitatis, Series: Architecture and Civil Engineering, 2017.
The purpose of this paper is to present the methodology for performance-based
seismic evaluation of soil-pile-bridge pier interaction using the incremental
nonlinear dynamic analysis (INDA). The system's input signal is treated through
the generated artificial accelerograms which were subsequently processed by
soil layers and for the bedrock. The INDA analysis was post processed
separately for the pier and for the pile, so that the constructed PGA=f(DR)
curves are in the capacitive domain. For these curves the authors identified the
performance levels, while the regression analyses were conducted based on the
specific DR and PGA parameters. Fragility curves were constructed based on
the solutions of regression analysis and the probability theory of log-normal
distribution. Based on the results of fragility analysis, reliability curves were
also constructed. The methodological procedure for seismic performance
analysis presented in this study provides an integrated quantitative-qualitative
consideration and evaluation of the complex soil-foundation-structure
interaction (SFSI).
Keywords: incremental nonlinear dynamic analysis, pile performance, fragility,
reliability, artificial accelerograms.
Pregled naučnih i stručnih rezultata u 2017. godini 47
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U CELINI (M33)
A. Weninger-Vycudil, D. Kokot, J. Ćirilović, B. Kulauzović, P. Lepert, M. de
Lurdes Antunes, P. Marcelino, J. Litzka, M. Wistuba, N. Tanasić, F.
Schiffmann, R. Hajdin
CEDR-PROJECT ISABELA - THE WAY TO INTEGRATE SOCIAL
PERFORMANCE INDICATORS INTO ASSET MANAGEMENT
World Congress on Pavement and Asset Management, Baveno, Italy.
Social aspects in form of social effects and benefits become more and more
important in the context of assessing different maintenance strategies on the
road infrastructure networks. The decision makers need to present the
consequences of their strategies and policies on both, the technical level and
more and more the social level.The main objective of the CEDR-project
ISABELA (Integration of social aspects and benefits into life-cycle asset
management) is the definition of a holistic asset management framework for
social key performance indicators (S-KPIs) and social benefit modelling in form
of social effects (monetary and non-monetary), social backlog and social risk.
The project aims at identifying clear and justifiable social key performance
indicators in combination with existing technical parameters. ISABELA takes
into account maintenance aspects such as traffic availability, disturbance and
efficiency (travel time, vehicle operating costs, etc.), road safety (fatal and
severe accidents related to asset condition), environment (noise, air pollution,
natural resources, etc.) and socio economy (asset value, wider social effects,
etc.). The results of the project will provide a clear and reproducible definition
of the necessary basics for social benefit calculation within life-cycle-
assessment (LCA), life-cycle-cost-analysis (LCCA) and risk assessment. In
addition, the implementation packages of the project should clearly show how
the theoretical approach can be applied in practice under certain framework
conditions. Thus, ISABELA aims to extensively improve the assessment of the
total road infrastructure from socio economic viewpoint and open the door to
the development of broader asset management processes to meet actual and
future challenges.
48 Institut za ispitivanje materijala a.d. Beograd
Keywords: maintenance and rehabilitation strategies, political strategies for
pavements and assets, risk management, life cycle assessment, life cycle cost
analysis.
B. Folić, M. Ćosić, Đ. Lađinović, S. Sedmak
SOME CASES OF DAMAGE AND RETROFIT OF MIDDLE FRAME
BRIDGE AFTER EARTHQUAKE
Assessment, maintenance and rehabilitation of civil structures and settlements,
X international conference, Vršac, 2017, 105-112.
This paper discusses some aspects of (unusual) reinforcing middle frame of the
bridge (overpass) after earthquake, using brick infill. The effects of dynamics
soil-pile-structure interaction were introduced into the consideration, using link
elements. We analyzed possible cases of damage and retrofit of four columns
and states of plastic hinge at teh top and bottom of column and piles.
Keywords: dynamics soil-pile-structure interaction, link elements of infill, link
lements of soil
J. Ćirilović, G. Mladenovic, C. Queiroz
INTEGRATION OF GREENHOUSE GAS COST INTO NETWORK-
LEVEL PAVEMENT MANAGEMENT: CASE STUDY OF SERBIAN
ROAD NETWORK
Transportation Research Board, Washington DC, USA, 2017, 17-03380.
In addition to their attempt to lower overall maintenance costs while keeping
their road networks in the appropriate condition, road agencies are facing even
more demanding challenges as they incorporate effects of global climate change
and other environmental impacts into their decision making process. Many
studies and research initiatives have shown the impact of pavement condition on
vehicle fuel consumption and maintenance costs, indicating that maintaining the
pavement network at lower roughness levels would reduce fuel and parts
consumption, which is beneficial for the users. On the other hand, the more
intensive pavement maintenance, which is required to keep road networks in
better condition, is accompanied by substantial emissions and negative
environmental impacts. New technologies are emerging worldwide which tend
Pregled naučnih i stručnih rezultata u 2017. godini 49
to prolong the period between road maintenance interventions. However, these
technologies, in many cases, require high upfront investments, which may be
acceptable (even recommendable) if one considers the whole life of a pavement.
The objective of this paper is to find an optimal maintenance plan at network
level that minimizes the total cost to society, which is the sum of: (i) agency
costs (i.e. cost of pavement maintenance and improvement works); (ii) user
costs (or vehicle operating cost - VOC); and (iii) the environmental impact cost
during the entire pavement life-cycle. Work presented herein proposes use of an
integrated model for pavement maintenance optimization at the network level,
which determines optimal maintenance plan that leads to lowering both total
society cost and total CO2 emissions during an analysis period. Proposed
solution finds balance between use of eco friendly technologies (such are
recycling or WMA) and use of the least costly maintenance treatments from the
road agency standpoint. The application of methodology is illustrated through
case study of on Serbian road network, but it can be applied elsewhere. The
methodology aims on reaching close-to-optimal solution of a complex multi-
objective problem.
Keywords: pavements, optimization, CO2 emissions, pareto, genetic
algorithms.
J.Ćirilović, G.Mladenovic, C.Queiroz
INTEGRATED LCA AND LCCA NETWORK LEVEL PAVEMENT
MAINTENANCE MODEL
World Congress on Pavement and Asset Management, Baveno, Italy.
Pavement management systems tend to lead to sound decision making
regarding the optimal maintenance strategy whichis, in most cases, based on the
achievement of minimal total society costs whichare defined as the sum of user
cost and road agency cost. User costs include costs related to the usage of the
road, such asthe costs of gasoline or diesel fuel, motor oil, spare parts,
pneumatics, costs related to travel time and accidents. In the last several years,
in addition to the aforementioned user cost drivers, costs related to
environmental impacts have been also considered as significant contributors to
overall costs. Road agency costs are generated by road construction and
maintenance activities such as overlays in various thicknesses, rehabilitation
50 Institut za ispitivanje materijala a.d. Beograd
and reconstruction. There is an established relationship that shows that
pavement deteriorationleads to an increase in negative environmental impacts.In
order to improve pavement condition, after reaching a certain threshold value, a
maintenance treatment is applied. That activity leads to lowering the emissions
generated during the usage phase but, at the same time, generates significant
negative environmental impact during the execution of the road works,such as
laying a new pavement layer. The objective of this paper is to present a model
that integrates LifeCycle Assessment (LCA) and Life Cycle Cost Analysis
(LCCA), on a network level. The model has been applied on the national road
network of Serbia. The results show how this integrated approach leads to more
sound decision making compared with current state of practice.
Keywords: pavement management systems, LCA, LCCA, optimization,
sensitivity analysis.
K. Božić-Tomić, N. Šušić, M. Prica, K. Đoković
ECONOMIC ANALYSIS OF PROJECT SOLUTIONS FOR LANDSLIDE
REPAIR WITH EFFECTS OF ADDITIONAL COLLAPSING OF SOIL
VII International Scientific Conference Geotechnics in Civil Engineering,
Šabac, 2017, 363-376.
The paper presents the economic analysis of seven project solutions of
landslides at different locations in Serbia. It has been proved that the actual total
amount of works and the final price of works on the landslide repair are higher
than designed Bill of Quantities. The reasons for increasing the quantity of
works and the prices of works are, to a large extent, due to additional collapsing
of soil with the appearance of secondary landslides, which could not be
calculated with classical mathematical models. Also, it has been proven that the
number of investigation boreholes are in direct correlation with the quality of
the obtained results of the mathematical model of the landslide.
Keywords: landslide, economic analysis, parameters, stability.
Pregled naučnih i stručnih rezultata u 2017. godini 51
K. Đoković, J. Ćirilović, L. Čaki, N. Šušić
ESTIMATION OF CLAY COMPACTION PARAMETERS BY
MACHINE LEARNING 1
Transportation Research Board 96th Annual Meeting, Washington, USA, 2017,
Report 17-02100, 1-13.
The paper presents an application of three methods: regression analysis,
artificial neural networks (ANNs) and support vector machines (SVMs), for the
estimation of the compaction parameters: maximum dry density (MDD) and
optimum moisture content (OMC) from index properties of the soils: liquid
limit (LL), plastic limit (LP), plasticity index (PI), grain-size distribution and
specific gravity (Gs). The data collected in the course of laboratory testing was
used for the estimation of soil compaction parameters. The samples belong to
various clay types, and were obtained from cores from four earth-fill dams:
Rovni, Selova, Prvonek and Barje, located in Serbia and served as control
samples during soil compaction. The developed models can be used to estimate
the compaction parameters: (i) in the preliminary stages of the project
development, and (ii) in the course of the preliminary assessment of the
suitability of a material from borrow pits for use in earth-fill structures. This
analysis also shows the comparison between the three methods in terms of
applicability and goodness of fit.
Keywords: clay, compaction, regression analyses, artificial neural networks,
support vector machines.
K. Đoković, L. Čaki, N. Šušić
ESTIMATION, IDENTIFICATION AND STABILIZATION OF
DISPERSIVE SOILS
17th International Symposium of Macedonian Association of Structural
Engineers, Ohrid, Macedonia, 2017, ST-4, 950-957.
Dispersive soil can not be determined by visual identification or standard
identification - classification test such as granulometric analysis (grain size),
plasticity tests, etc. The paper presents the results of the testing of dispersivity
of fine-grained soil using classification tests, specially designed for the testing
of dispersive soil: the crumb test, the double hydrometer test and the pinhole
test. Also, the tests carried out by pin-hole were performed on samples of
52 Institut za ispitivanje materijala a.d. Beograd
dispersive soils with the addition of fly ash, which showed that the addition of a
certain percentage of ash is achieved by improving soil behavior, i.e. the soil
has become un-dispersive.
Keywords dispersive soils, the crumb test, the double hydrometer test, pin-hole
test.
K. Đoković, O. Mažibrada
COMPARISON EN AND SRPS STANDARDS FOR GEOTECHNICAL
IDENTIFICATION AND CLASSIFICATION OF SOIL
VII international scientific conference Geotechnics in Civil Engineering, Šabac,
2017, 69-74.
The paper presents a review of the newly adopted European standards for
geomechanical identification and soil classification SRPS EN ISO 14688-1:
2012 and 14688-2. Also, the basic principles of soil identification and
classification according to EN standards are given and a comparative analysis
with valid SRPS standards is presented.
Keywords: soil, geomechanical identification and classification, EN standards.
K. Đoković, S. Tošović
APPLICATION OF CEMENT MIXTURE STABILIZED CRUSHED
AGGREGATE AND RECYCLED ASPHALT IN ROAD
REHABILITATION
Assessment, maintenance and rehabilitation of civil structures and settlements,
X international conference, Vršac, 2017, 255-262.
The papers present testing results of cement stabilized mixture of crushed stone
aggregate 0-31.5 mm (DKA) and recycled asphalt (RA) and pressed indirectly
tensile strength and modulus of elasticity, which are used in the classification of
the stabilized mixture and design the pavement structure in the process of cold
recycling. It also defines the optimal proportion of recycled asphalt stabilized
mixture with crushed stone aggregate.
Keywords: recycled asphalt, cold recycling.
Pregled naučnih i stručnih rezultata u 2017. godini 53
S. Tošović, K. Đoković
POSSIBILITIES OF APPLICATION CEMENT STABILIZED
MIXTURE IN THE PROCESS OF COLD RECYCLING
5th Scientific – Expert Meeting Road and Environment, Vršac, 2017, 541-546.
This paper presents the determination of physical-mechanical parameters: the
indirect tensile strength (Rt) and the dynamic modulus of elasticity (E), which
are applied in pavement design in the process of cold recycling. Tests were
conducted on mixtures of cement stabilized crushed stone (DKA) and recycled
asphalt (RA) containing different proportions of this components and the
different percentage of 3%, 5% and 7% of cement. In addition to determining
the above parameters for the design, the goal of the conducted test was to
determine the optimal, and the proportion of recycled asphalt in mixture with a
crushed stone aggregate, and of the optimal addition of cement as hydraulic
binder. On the basis of the obtained values was carried out categorization of the
stabilized mixture according to the standard EN 14227-10: 2006, which
continues to have application in the design of pavements.
Keywords: recycled asphalt, cold recycling, indirect tensile strength, dynamic
modulus of elasticity.
B. Folić, N. Šušić, M. Ćosić
THE USE OF COMPUTERS IN DETERMINING THE PARAMETERS
OF THE FUNCTIONS FOR LOESS SOIL
VII International Scientific Conference Geotechnics in Civil Engineering,
Šabac, 2017, 155-164.
The paper presents the possibilities of determing functions of some
characteristic parameters of loess soil. The loess soil is of Eolian origin, its
formation is related to the Ice Age, it is classified as dusty-sandy-clayey soil,
and very large extent of results are possible depending on humidity, location,
porosity, anisotropy, etc. The problem of loess soilis is very complex and this is
an attempt to restore partially neglected research by Milović, Stevanović and
others with the classification of characteristics, which can only be used with a
certain probability.
54 Institut za ispitivanje materijala a.d. Beograd
Keywords: loess soil, porosity, anisotropy, loess sampling, dry weight, curve
edometric curve, specific coefficient of settlement.
Pregled naučnih i stručnih rezultata u 2017. godini 55
T 230
BUILDING CONSTRUCTION T 230
VISOKA GRADNJA
56 Institut za ispitivanje materijala a.d. Beograd
RAD U ČASOPISU MEĐUNARODNOG
ZNAČAJA VERIFIKOVANOG POSEBNOM
ODLUKOM (M24)
M. Ćosić, R. Folić, S. Brčić
AN OVERVIEW OF MODERN SEISMIC ANALYSES WITH
DIFFERENT WAYS OF DAMPING INTRODUCTION
Building Materials and Structures, Vol. 60, No. 1, 3-30, 2017.
The authors of the paper, on the basis of the analysis of a large number of
scientific papers, presented their original systematization of seismic analyses of
structures, where a large number of them were developed during the last twenty
years. Seismic analyses are generally classified into two (four) groups: Linear
Static Analyses (LSA) and Nonlinear Static Analyses (NSA), and Linear
Dynamic Analyses (LDA) and Nonlinear Dynamic Analyses (NDA). The
analyses of nonlinear seismic structural response were classified separately
from the Target Displacement Analyses (TDA) which defines the relationship
of the seismic demand and seismic response. On the other hand, classification
was also conducted depending on whether a nonlinear response of the system is
obtained by the implementation of incremental-iterative procedures or by
implementation of semi-iterative and/or semi-incremental procedures. NDA
were classified according to the concept of mathematical formulation, i.e.
whether they are based on only one dynamic analysis, several dynamic analyses
or they are solved in combination with other methods. By implementing the
conducted systematization of seismic analyses, one can efficiently consider
which type of analysis is optimal for structural analysis and which type of
analysis should be taken into account in the phase of preliminary and final
analyses in the course of scientific research and professional projects.
This paper also presents the aspects of damping modelling in structural analysis
through the systematization of damping types and flowcharts, depending on the
type of analysis applied: linear and nonlinear, static and dynamic. Damping has
been systematized based on the way it was introduced into calculations, i.e. over
material damping, link element damping and damping directly introduced into
the analyses which are conducted in capacitive, time and frequency domains. In
the process of creating numerical structural models, the type of damping and the
Pregled naučnih i stručnih rezultata u 2017. godini 57
way of its introduction into structural analysis can be very efficiently selected
by applying the flow charts developed. By applying the developed flowcharts,
alternative approaches to the introduction of damping into structural analysis
can also be defined.
Keywords: seismic analyses, damping, systematization, performances,
structures.
58 Institut za ispitivanje materijala a.d. Beograd
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U CELINI (M33)
M. Drpić, M. Mirković
NEW APPROACH IN THE CLASSIFICATION OF THE REACTION
TO FIRE PERFORMANCE OF CONSTRUCTION PRODUCTS
27th international symposium on research and application of contemporary
achievements in construction materials and structures, Vršac, 2017, 517-524.
Passive fire protection in the civil engineering shall be prescribed in the national
regulation accross the global frame and specific national rules. Reaction to fire
performances of construction products makes the basic part ot theese activities,
and the new approach in EU-regulations leads to some changes of
classiffications performances. All of theese adoptions are based on Regulation
(EU) No. 305/2011.
Keywords: passive fire protection; civil engineering; national rules; reaction to
fire performance.
M. Mirković, M. Aškrabić, Z. Petojević, G. Todorović, R. Gospavić
DETERMINATION OF CONVECTIVE HEAT TRANSFER
COEFFICIENT OF A FACADE WALL BY LONG- TERM
MEASUREMENTS
27th international symposium on research and application of contemporary
achievements in construction materials and structures, Vršac, 2017, 417-504.
In this paper, results of measurements of heat fluxes on inner and outer surfaces
of a facade wall of a resident building in Belgrade as well as air temperatures on
both side of the wall are represented. The experimental data were obtained in
simultaneous measurements in period from the 1st May 2017 until the 30th May
2017 in every 5min in one apartment with heterostructure facade wall facing
north. Two “gSKIN” fluxmeters and NiCr-Ni thermocouple are used in the
experiment. Based on experimental data, a convective heat transfer coefficients
on both sides of the wall as a function of time and their means are calculated.
Also an accumulation of heat in the wall as a function on time were calculated
and shown.
Pregled naučnih i stručnih rezultata u 2017. godini 59
Keywords: The heat transfer coefficient, temperature measurements, heat flux
measurements, the accumulation of heat.
N. Mirković, P. Mitković,B. Ninić, J. Milovanović, M. Mirković, Z. Petojević, D.
Šumarac, R. Gospavić, G. Todorović
COMPOSITE STRUCTURAL MEMBERS IN FIRE CONDITIONS AND
MEASURES OF PROTECTION
5th International Conference Contemporary achievements in civil engineering,
Subotica, 2017, 131-140.
In this paper, the results of numerical simulation of 2D non-stationary
temperature fields in commonly used composite structural members made of
steel and concrete in fire conditions were presented. Simulation is based on the
model which includes temperature dependence of physical parameters of
materials, specific heat and thermal conductivity. Analysis of composite
structural members comprises determination of a heat flux field which
additionally facilitates understanding of region and geometry of heat flow, thus
enhancing fire protection design. Initial temperature distribution is adopted as
uniform, according to Eurocode. Fire conditions were according to ISO 834.
The FEM computations for different protection scenario and protective
materials for partially encased I section - are conducted in ABAQUS. Obtained
results can be used in cost optimization of fire protection measures.
Keywords: fire protection, composite structural members, heat flux,
temperature field.
Z. Petojević, P. Mitković, N. Mirković, J. Milovanović, B. Ninić, , M. Mirković,
D. Šumarac, R. Gospavić, G. Todorović
ESTIMATION OF TEMPERATURE TRANSFER FUNCTION IN
FACADE WALL HEAT TRANSPORT
5th International Conference Contemporary achievements in civil engineering,
Subotica, 2017, 739-748.
This paper is presenting a method for temperature transfer function (TTF)
estimation by filtering an experimentally collected data. The experimental data
were obtained in simultaneous measurements of inside and outside temperatures
60 Institut za ispitivanje materijala a.d. Beograd
variations during the period of 3 months of a building located in Belgrade,
Serbia. The TTF estimation is based on Wiener filtering technique for the
dynamic systems with finite impulse response (FIR). TTF is derivate in time
and complex domain and the correctness of the acquired transfer function is
tested on the new input data set. The estimated TTF in complex domain is used
to get decrement factor (DF) and time lag (TL) between the temperatures.
Keywords: transfer function, heat transport, decrement factor, time lag
Pregled naučnih i stručnih rezultata u 2017. godini 61
T 270
ENVIRONMENTAL
TECHNOLOGY,
POLLUTION CONTROL
T 270
TEHNOLOGIJA
ŽIVOTNE SREDINE,
KONTROLA ZAGAĐIVANJA
62 Institut za ispitivanje materijala a.d. Beograd
RAD U TEMATSKOM ZBORNIKU
MEĐUNARODNOG ZNAČAJA (M14)
D. Radulović, A. Terzić, Lj. Andrić
THE CONSTRUCTION AND CERAMICS INDUSTRY WASTE
GYPSUM VALORIZATION POSSIBILITIES
IV Advanced Ceramics and Applications Conference, Chapter 32,
Springer/Atlantis Press, USA, 2017, 475-491.
The construction work and ceramic materials industry debris is an important
source of waste that ends up unused and disposed on municipal solid waste
landfills. Besides concrete and clay based materials, gypsum waste is one of the
larger contributors to the building and industry byproducts production chain.
The possibilities of waste gypsum revitalization and reutilization in the ceramic
industry and civil engineering are investigated in this paper. The gypsum in its
dihydrate form is used for moulds in the production of ceramic cast materials.
The interest in recovering gypsum waste is increasing as the demand for
sustainable production grows. Before secondary gypsum is reapplied, its
properties and the recycling process have to be technically and environmentally
evaluated. By recycling gypsum waste, natural gypsum deposits are being
preserved. Furthermore, large percentage of this byproduct achieves its
reutilization potential. In this context, this paper investigates physical
properties, the chemical composition and the thermal behavior of the waste
gypsum. The goal is to assess the feasibility of using waste gypsum and to
evaluate the viability of the recycling process. The results indicate that the
reutilization of gypsum waste might provide a viable substitute for clay in the
ceramics industry. Reapplication of the revitalized secondary gypsum is
approved from both economical and environmental aspect.
Keywords: construction materials; physic-mechanical properties; recycling;
eco-friendly ceramics.
Pregled naučnih i stručnih rezultata u 2017. godini 63
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U CELINI (M33)
D. Stanojlović, T. Spasojević-Šantić, M. Trivunić
ANALYSIS OF THE STATE OF CONSTRUCTION WASTE
MANAGEMENT IN REPUBLIC OF SERBIA
International Scientific Conference People, Buildings and Environment 2016
(PBE2016), Luhacovice, Czech Republic, Vol. 4, 2016, 221-229.
Construction waste includes waste generated during construction,
reconstruction, maintenance or demolition of existing buildings, as well as
waste generated from excavated material, which cannot be used without prior
treatment. It is estimated that about 1 million tones of construction and
demolition waste is produced in the Republic of Serbia annually. Construction
waste in Serbia ends up at municipal waste landfills and utilize as an inert
material for covering of waste at the landfills. This kind of approach has a
negative impact on the environment and human health. Therefore, the purpose
of this paper is to present analysis of the state of construction waste
management in the Republic of Serbia. The research results show that there is
no consolidated data of the specific composition of construction waste that is
being disposed of at landfills at any level. Additionally, it’s necessary to
establish control of construction and demolition waste quantity, composition
and stream, which would meet requirements for designing a system of
collection, transport, recycling, reuse and disposal of the waste.
Keywords: by-product, construction waste, landfills, recycling, waste
management.
64 Institut za ispitivanje materijala a.d. Beograd
S. Serbula, N. Mijatović, J. Milosavljević, A. Radojević, T. Kalinović, J.
Kalinović, R. Kovačević
ZN AND PB UPTAKE AND TRANSLOCATION IN NETTLE FROM
METAL POLLUTED AREA
The 49th International October Conference on Mining and Metallurgy, Bor,
2017, 161-165.
The analysis of Zn and Pb content and biological factors were performed in
order to investigate the uptake and translocation of metals, as well as
biomonitoring abilities of nettle. The soil and plant material were sampled in the
area polluted with metals originating from the copper mining activities. The
content of Zn, an essential element, was higher in plant material than the
content of potentially toxic Pb. The results have shown that nettle roots and
leaves acted as excluders of Zn or Pb. The translocation factor indicated
effective transport of metals from roots to leaves at low soil concentrations.
Keywords: nettle, zinc, lead, soil pollution.
Pregled naučnih i stručnih rezultata u 2017. godini 65
SAOPŠTENJE SA SKUPA NACIONALNOG
ZNAČAJA ŠTAMPANO U CELINI (M63)
M. Vasić, Z. Radojević, Lj. Miličić
METODE ZA OCENU UTICAJA OPASNIH MATERIJA PRISUTNIH U
GRAĐEVINSKIM PROIZVODIMA NA ŽIVOTNU SREDINU
XXVII međunarodni simpozijum o istraživanjima i primeni savremenih
dostugnuća u građevinarstvu u oblasti materijala i konstrukcija, Vršac, 2017,
413-418.
Evropska komisija je 23. juna 2016 godine zauzela stav da je deo
harmonizovanih Evropskih standarda (hENs) kojima se naznačava upotreba
nacionalnih propisa za određivanje uticaja opasnih materija uključujući i
Evropsku bazu o opsanim materijama, neusklađen sa uredbom o građevinskim
proizvodima CPR. Potom je Evropski savet definisao manadat tehničkim
komitetima CENa sa preporukama da se u hEN standarima mora na
nedvosmislen i jasan način u skladu sa zahtevima CPR-a odnositi prema emisiji
opasnih materija, prisutnih u građevinskim proizvodima, na životnu sredinu. U
ovom radu će biti ukratko predstavljene metode koje je do sada razvio tehnički
komitet TC 351. Funkcija standarda CEN/TS 16637-1 se ogleda u pružanju
informacija, na osnovu kojih CEN tehnički komiteti za svaki konkretni
građevinski proizvod i EOTA eksperti zauzimaju stavove u odnosu na
relevantne ispitne metode koje se odnose na ocenu uticaja opasnih materija
prisutnih u građevinskim proizvodima na životnu sredinu. Na ovaj način se vrši
podsticanje proizvođača građevinskih proizvoda da deklaraciju performansi
koje se odnosi na sadržaj opasnih materija izvrše na osnovu rezultata
ispitivanja.
Ključne reči: opasne materije, građevinski proizvodi, deklaracija o
performansama, životna sredina, tehnička regulativa.
66 Institut za ispitivanje materijala a.d. Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 67
T 350
CHEMICAL TECHNOLOGY
AND ENGINEERING
T350
HEMIJSKA TEHNOLOGIJA
I INŽENJERING
68 Institut za ispitivanje materijala a.d. Beograd
RAD U VRHUNSKOM MEĐUNARODNOM
ČASOPISU IZUZETNIH VREDNOSTI (M21A)
M. V. Vasić, L. Pezo, J. D. Zdravković, Z. Bačkalić, Z. Radojević
THE STUDY OF THERMAL BEHAVIOR OF MONTMORILLONITE
AND HYDROMICA BRICK CLAYS IN PREDICTING TUNNEL KILN
FIRING CURVE
Construction and Building Materials, Vol. 150, 2017, 872-879.
The aim of this study was to test montmorillonite and hydromica type of brick
clays by using simultaneous thermal analysis and dilatometry in an assessment
of the suitability of brick clays to produce building elements. The plasticity
coefficient and drying susceptibility were determined to discover the behavior
of brick clays. Fired products’ characteristics were studied by performing water
absorption and compressive strength tests. All the methods were employed in
the construction of the firing curves in a tunnel kiln. The results could increase
the degree of certainty to lead the production process towards obtaining the
desired features of brick elements.
Keywords: brick clays, thermal analyses, firing curves, process optimization.
Pregled naučnih i stručnih rezultata u 2017. godini 69
RAD U ISTAKNUTOM MEĐUNARODNOM
ČASOPISU (M22)
M. Vasić, R. Rekecki, Z. Radojević
A PROCEDURE FOR SETTING UP THE DRYING REGIME THAT IS
CONSISTENT WITH THE NATURE AND PROPERTIES OF THE
CLAY RAW MATERIAL
Drying Technology, 2017.
http://dx.doi.org/10.1080/07373937.2017.1324879.
Over the past three decades, traditional ceramic facilities: chamber and tunnel
dryers are improved. Better thermo-technical equipment, operational strategies
as well as reliable scale - up methodologies have lead to higher quality of the
dried clay roofing tiles. Although there has been a progress, up to this study,
there is no universally or even widely applicable criterion, which could be used
to precisely define the change of drying air parameters (humidity, temperature,
and velocity) during the drying process. The objective of this study was to
specify the variable air parameters that should be used during the drying process
in order to approach as much as possible to the theoretically defined optimal
drying process.
Keywords: drying process, drying regime, effective diffusion coefficient, clay
roofing tile, clay raw material.
70 Institut za ispitivanje materijala a.d. Beograd
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U CELINI (M33)
M. Vasić, Z. Radojević
DEFINING A PROCEDURE FOR PREDICTING THE DURATION OF
THE APPROXIMATELLZ ISOTHERMAL SEGMENTS WITHIN THE
PROPOSED DRYING REGIME AS A FUNCTION OF THE DRYING
AIR PARAMETERS
International Conference on Modern Technologies in Industrial Engineering
ModTech 2017, Sibiu, published in IOP Conf. Series: Materials Science and
Engineering, 2017, 227.
doi:10.1088/1757-899X/227/1/012134.
One of the main disadvantages of the recently reported method, for setting up
the drying regime based on the theory of moisture migration during drying, lies
in a fact that it is based on a large number of isothermal experiments. In
addition each isothermal experiment requires the use of different drying air
parameters. The main goal of this paper was to find a way how to reduce the
number of isothermal experiments without affecting the quality of the
previously proposed calculation method. The first task was to define the lower
and upper inputs as well as the output of the “black box” which will be used in
the Box-Wilkinson’s orthogonal multi- factorial experimental design. Three
inputs (drying air temperature, humidity and velocity) were used within the
experimental design. The output parameter of the model represents the time
interval between any two chosen characteristic points presented on the Deff – t.
The second task was to calculate the output parameter for each planed
experiments. The final output of the model is the equation which can predict the
time interval between any two chosen characteristic points as a function of the
drying air parameters. This equation is valid for any value of the drying air
parameters which are within the defined area designated with lower and upper
limiting values.
Keywords: drying process, drying regime, effective diffusion coefficient, clay
roofing tile, clay raw material.
Pregled naučnih i stručnih rezultata u 2017. godini 71
SAOPŠTENJE SA SKUPA NACIONALNOG
ZNAČAJA ŠTAMPANO U CELINI (M63)
M. Vasić, Z. Radojević
EXTENSION OF THE RECENTLY REPORTED PROCEDURE FOR
OPTIMAL DRYING REGIME SPECIFICATION
27th international symposium on research and application of contemporary
achievements in construction materials and structures, Vršac, 2017, 81-87.
Recently reported procedure, for predicting the optimal non-isothermal drying
regime of clay masonry units, has not been widely used due to the fact that it is
based on a large number of experiments. The objectives of this study were to
reduce the number of experiments and to keep the quality of the previously
proposed calculation method. Extension procedure was based on the Box-
Wilkinson’s orthogonal multi – factorial “Black box” method. The final output
of the model represents the equation which can predict the time interval
between any two chosen characteristic points (registered on Deff – t curves) as a
function of the drying air parameters.
Keywords: drying, heavy clay units, drying regime, effective diffusion
coefficient.
72 Institut za ispitivanje materijala a.d. Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 73
T 450
METAL TECHNOLOGY,
METALLURGY,
METAL PRODUCTS
T450
TEHNOLOGIJA METALA,
METALURGIJA,
PROIZVODI OD METALA
74 Institut za ispitivanje materijala a.d. Beograd
RAD U ČASOPISU MEĐUNARODNOG
ZNAČAJA VERIFIKOVANOG POSEBNOM
ODLUKOM (M24)
V. Aleksić, Lj. Milović, B. Aleksić, S. Bulatović, Z. Burzić, A. M. Hemer
BEHAVIOUR OF NIONIKRAL-70 IN LOW-CYCLE FATIGUE
Structural Integrity and Life, Vol.17, No. 1, 2017, 61-73.
Experimental research on the behaviour of high-strength low-alloy steel
(HSLA) exposed to low-cycle fatigue (LCF) with controlled and fully reversible
strain ( /2 = const, R = min/ max = –1) has been analysed. LCF tests are
performed on a series of smooth bar shaped specimens, 11 11 95 mm,
parent metal (PM), welded joint (WJ) and simulated heat affected zone (SHAZ)
of steel Nionikral 70 (NN-70) with semi-amplitude of controlled strain, /2 =
0.40-0.80. The results of the experimental investigation have given us important
information on the understanding of fatigue behaviour of steel NN-70 and its
welded joints. In this work the results of static and dynamic-, that is
monotonous and fatigue behaviour of the material, are compared, which is a
practical contribution to the assessment of the behaviour of PM and WJ of steel
NN-70 exposed to effects of low cycle fatigue, i.e. monotonous and fatigue
behaviour of the material.
Keywords: high strength low-alloyed steel (HSLA), low-cycle fatigue (LCF),
simulated heat affected zone (SHAZ), Nionikral 70 (NN-70).
Pregled naučnih i stručnih rezultata u 2017. godini 75
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U CELINI (M33)
Lj. Milović, B. Aleksić, S. Petronić, A. M. Hemer, V. Aleksić
P91 STEEL SIMULATED HAZ BEHAVIOUR AT 600°C
12th international conference Structural Integrity of Welded Structures,
Timişoara, Romania, 2017.
An investigation has been carried out into the behavior of type IV cracks region
in simulated heat affected zone (HAZ) of P91 steel at operation temperature of
600°C. HAZ region where type IV failures may occur have been studied in
details. Results are reported on the simulated specimens 11x11x70 mm tested at
room and at operating temperature. The results of comparison of mechanical
characteristics and microstructure have been analyzed using two types of
simulated specimens: with postweld heat treatment (PWHT) and without
PWHT. The presence of precipitates at the grain boundaries in simulated type
IV zone of HAZ exposed to subsequent PWHT has been found. It is further
confirmed that the PWHT is necessary for P91 steel weldments.
Keywords: P91, Simulated HAZ, ICHAZ, PWHT.
S. Cvetkovski, V. Grabulov
DETERMINATION OF CHARACTERISTIC MICROSTRUCTURES IN
SIMULATED AND REAL TIG AND LASER WELDMENTS OF OPTIM
960 QC STEEL
9th International Scientific – Professional Conference Engineering Technologies
in Manifacturing of Welded Constructions and Products SBW 2017, Slavonski
Brod, Croatia, 2017, 106-115.
In this research work metallographic analysis of simulated and real
microstructures in HAZ of Optim 960 QC was performed. Thin sheets (6 mm)
were used for simulation and real TIG and laser welding. Special specimens
were prepared for welding simulation. The peak temperatures corresponding to
specific microstructures in the HAZ was obtained by performing welding using
Gleeble 1500 welding simulator. The following parameters were used in the
76 Institut za ispitivanje materijala a.d. Beograd
thermal simulation: heating rate: 500°C/s, peak temperature: 500, 600, 700, 800,
900, 1000, 1100, 1200, 1250, 1300 and 1350 °C/s, holding time: 1 s, cooling
8/5: 1,7 s (air cooling). Two autogenously TIG welding experiments
using different welding heat input were carried out. Besides, CO2 laser beam
welding experiments were carried out too.
After performing welding simulation and real welding. metallographic
preparation of specimen was done. Standard metallographic preparation of
specimens was performed. Besides optical microscopy; scanning electron
microscopy was used for microstructural analysis. Hardness measurements and
determinations of grain sizes were performed on simulated metallographic
specimens. Besides comparison of different micro constituents (real and
simulated), the length of total HAZ in dependence of the heat input was
analyzed too.
Keywords: Optim 960 QC steel, HAZ, welding microstructure, Gleeble
simulator, grain size.
V. Grabulov, Z. Burzić, M. Burzić, S. Perković, M. Manjgo
TESTING OF IMPACT PROPERTIES OF WELDED JOINTS BY
NOTCHED AND PRECRACKED SPECIMENS
9th International Scientific – Professional Conference Engineering Technologies
in Manifacturing of Welded Constructions and Products SBW 2017, Slavonski
Brod, Croatia, 2017, 354 – 361.
The application of high strength steel and its welded joint in structures, exposed
to very high stresses can be accepted if the properties satisfy strong
requirements. The benefits which can be obtained by increased strength must be
additionally confirmed by sufficient resistance to brittle fracture, e.g. by the
resistance to stress concentration. For that reason the data about impact V notch
toughness and about crack behaviour in impact and in stable crack growth
condition are required before final decision for the selection of high strength
steel for manufacturing highly loaded welded structures. For that, the data of
crack resistance for weld metal (WM) and the heat-affected-zone (HAZ) are
also necessary. Applied techniques in this experiment enabled to evaluate
separately notch and crack parameters of welded joint constituents (base metal -
BM, WM and HAZ), important for the application of high strength steel.
Pregled naučnih i stručnih rezultata u 2017. godini 77
Keywords: welded joint, microalloyed steel, impact testing, crack sensitivity.
Z. Burzić, M. Burzić, V. Grabulov, S. Perković, M. Manjgo
FATIGUE OF HIGH STRENGTH STEEL WELDMENT IN PRESSURE
VESSELS APPLICATION
9th International Scientific – Professional Conference Engineering Technologies
in Manifacturing of Welded Constructions and Products SBW 2017, Slavonski
Brod, Croatia, 2017, 340 – 346.
The application of high strength steels in design of heavy duty welded
structures requires the data about the properties in different loading condition.
This is of importance for pressurized equipment, but also for other industrial
branches (cranes, earth moving machines). The behaviour under variable
loading can annul the benefits of high strength, and for that it has to be
analyzed. The testing results of high strength steel NIONIKRAL 70 (nominal
yield stress 700MPa) and its MMAW welded joints under variable loading are
presented and discussed. Fatigue crack growth rate is determined by precracked
specimens testing. The difference in crack growth rate properties between
parent metal, weld metal and HAZ is less expressed compared to other
properties of high strength steel welded joint.
Keywords: welded joint, microalloyed steel, Paris law, fatigue threshold,
fatigue crack growth rate.
Z. Odanović
ANALYSIS OF THE RAILWAY FREIGHT CAR AXLE FRACTURE
ESIS TC24 Workshop Integrity of Railway Structures, 2016, Leoben, Austria,
published in Procedia Structural Integrity, 4, 2017, 56-63.
Railway axles are vital parts of passenger or freight railway car. Their failure
may result in potentially disastrous consequences with possible human victims.
Accordingly, railway axles are designed to be highly reliable, while the
maintenance system requires periodically regular non-destructive inspection.
However, due to complex exploitation conditions, complex stress state and
multiple stress concentration, railway axles could experience fatigue failures.
This study presents an attempt to clarify the causes of an axle fracture of the
78 Institut za ispitivanje materijala a.d. Beograd
railway freight car for coal transport. Detailed analyses were conducted on the
axle mechanical properties. Novel methodology for calculation of the plane
strain fracture toughness KIc based on the measured values of the yield strength
and impact energy from KU data is estimated. Also, failure analysis of fractured
surface was performed. Macro and microstructure of the axle material is
included in analysis. The entire analysis has shown that the considered axle
failure was caused by inadequate maintenance and insufficient properties level
of the axle material in the railway axle critical cross-sections.
Keywords: railway engineering, failure analysis, destructive testing, pitting.
Pregled naučnih i stručnih rezultata u 2017. godini 79
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U IZVODU (M34)
B. Aleksić, A. Grbović, A. M. Hemer, Lj. Milović, V. Aleksić
EVALUATION OF STRESS INTENSITY FACTORS (SIFS) USING
EXTENDED FINITE ELEMENT METHOD (XFEM)
17th International Conference on New Trends in Fatigue and Fracture NT2F17,
Cancun, Mexico, 2017, 88.
Finite element method has been used for decades for calculating Stress Intensity
Factors (SIFs), but it has some restrictions in crack propagation simulations
mainly because the Finite Element mesh needs to be updated after each
propagation step to track the crack path. Extended Finite Element Method
(XFEM) suppresses the need to mesh and remesh the crack surfaces and can be
used for modelling different discontinuities in 3D domains. Discontinuities can
be represented independently of the FE mesh by exploiting the partition of unity
(PoU) method. In this method enrichment functions are added to the
displacement approximation as long as the PoU condition is satisfied. Thanks to
XFEM, problems involving static cracks in structures, evolving cracks, cracks
emanating from voids etc., can be numerically studied and then, results can be
compared against the analytical and experimental values. Cracks are propagated
and after each step of the propagation the SIFs can be computed from the
numerical solution at several points along the crack fronts. Interaction integrals
are used to extract the mixed-mode SIFs with the help of auxiliary fields.
XFEM is still not fully recognized and needs to prove its practical worth in
order to be generally acknowledged. Results obtained by using XFEM for a
complex 3D geometry are still not regarded as reliable without experimental
checks. The purpose of this paper is to demonstrate that reliable values of SIFs
can be obtained for three-dimensional structures with cracks. Results and
conclusions given here should contribute to making a more objective judgment
about XFEM usefulness in solving wide range of problems, especially those
related to the fatigue design.
Keywords: stress intensity factors, extended finite element method, crack
propagation, fatigue design.
80 Institut za ispitivanje materijala a.d. Beograd
B. Aleksić, V. Aleksić, A. M. Hemer, Lj. Milović, A. Grbović
DETERMINATION OF THE REGION OF STABILIZATION ON LOW-
CYCLE FATIGUE HSLA STEEL FROM TEST DATA
17th International Conference on New Trends in Fatigue and Fracture NT2F17,
Cancun, Mexico, 2017, 30.
Steel, NIONIKRAL 70 (NN-70), selected in this study to investigate the
experimental behaviour affected by fatigue loading, among other things, is used
in shipbuilding and for manufacture of pressure vessels as well. The experiment
was conducted using smooth round specimens made of steel NN-70 as parent
material (PM). When selecting stabilized hysteresis as a representative of all of
stabilized hysteresis for one strain level, and for the further processing of low-
cycle fatigue test results, the recommendations of standards have been used as
well as the methodology based on which linearity of the stabilization regions of
low-cycle fatigue was numerically determined. In present paper, the behaviour
of high-strength low-alloy (HSLA) steel under conditions of lowcycle fatigue
(LCF) has been experimentally tested and analyzed. Based on the experimental
results obtained in the programme EXCEL, characteristic regions of low-cycle
fatigue of steel NN70 have been determined, the most important being the
region of stable behaviour of materials, socalled "the region of stabilization".
From this region, on the basis of pre-defined requirements, characteristic
stabilized hysteresis have been isolated for each strain level, based on which the
indicators of low-cycle fatigue of steel NN-70 have been identified. For
selecting typical stabilized hysteresis and for further processing of the low-cycle
fatigue test results, new methodology with two new methods were used:
"Method of the middle stabilization (ms)" and "threshold NDT method
(tNDT)". The comparisons of those two methods are shown in this paper.
Keywords: low-cycle fatigue, HSLA, region of stabilization, NDT.
Pregled naučnih i stručnih rezultata u 2017. godini 81
B. Aleksić, V. Aleksić, Lj. Milović
ANALYSIS OF THE EFFECTS OF BUTT WELDED JOINTS ON A
CARRYING CAPACITY OF A STRUCTURE TANK
International Conference on Experimental and Numerical Investigations and
New Technologies, 2017, Zlatibor, 27.
In the present paper, after calculation using the Finite Element Method (FEM),
stress distribution on the model of a part of the pressure-tank mantle without
welded joints (WJ), with transversal WJ, longitudinal WJ and cross point
location of WJ is analyzed. Also, FEM calculation and comparative analysis of
the effects of WJ on the stress distribution have been conducted using the tank
for liquid carbon dioxide as an example, on which, in addition to the mantle
sheet-metal and bottom with necessary openings and elements such as saddles
with supports and hangers, transversal and longitudinal butt WJ, have been
modeled.
Keywords: finite element method, stress distribution, pressure-tank, welded
joints.
82 Institut za ispitivanje materijala a.d. Beograd
SAOPŠTENJE SA SKUPA NACIONALNOG
ZNAČAJA ŠTAMPANO U CELINI (M63)
B. Aleksić, V. Aleksić, Lj. Milović
ANALIZA OPRAVDANOSTI MODELIRANJA SUČEONO
ZAVARENIH SPOJEVA KOD PRORAČUNA POSUDA POD
PRITISKOM
V Međunarodni kongres Inženjerstvo, ekologija i materijali u procesnoj
industriji, Jahorina, Bosna i Hercegovina, 2017, CD, 1136-1144.
U radu je posle proračuna metodom konačnih elemenata (MKE) analizirana
raspodela napona na modelu dela oplate rezervoara pod pritiskom bez zavarenih
spojeva (ZS), sa obimnim ZS, podužnim ZS i ukrsnim mestom ZS. Takođe, u
radu je na primeru rezervoara za tečni ugljendioksid, na kome su pored limova
oplate i danaca sa potrebnim otvorima i elementima kao što su sedla sa
osloncima i uške modelirani obimni i podužni sučeoni ZS, urađen proračun
MKE i uporedna analiza uticaja ZS na raspodelu napona.
Ključne reči: MKE, ZS, analiza raspodele napona.
V. Aleksić, B. Aleksić, Lj. Milović
METODOLOGIJA ODREĐIVANJA POKAZATELJA PONAŠANJA
HSLA ČELIKA PRI DELOVANJU NISKOCIKLIČNOG ZAMORA
V Međunarodni kongres Inženjerstvo, ekologija i materijali u procesnoj
industriji, Jahorina, Bosna i Hercegovina, 2017, CD, 1123-1135.
U radu je analizirano eksperimentalno istraživanje ponašanja niskolegiranog
čelika povišene čvrstoće (HSLA) u uslovima niskocikličnog zamora (LCF), sa
kontrolisanom i potpuno reverzibilnom deformacijom ( /2 = const, R = min/
max = -1). Ispitivanja niskocikličnog zamora obavljena su na seriji glatkih
epruveta od čelika Nionikral 70 (NN-70), sa poluamplitudom kontrolisane
deformacije, /2=0.35, 0.45, 0.50, 0.60, 0.70 i 0.80. Za izbor stabilizovanih
histereza i obradu rezultata ispitivanja niskocikličnim zamorom, korišćene su
preporuke standarda ISO 12106:2003 (E) i ASTM E 606-04, kao i dve nove
metode: Metoda sredine stabilizacije (MSS) i Metoda praga NDT (MpNDT),
Pregled naučnih i stručnih rezultata u 2017. godini 83
što u ovom radu predstavlja četiri rezultata za poređenje. Za svaki nivo
deformacije izabrane su karakteristične stabilizovane histereze, određene prema
preporuci standarda ISO 12106:2003 (E) i ASTM E 606-04, MSS i MpNDT, sa
kojih su očitani potrebni podaci za dalju obradu rezultata i konačno,
konstruisanje karakterističnih krivih niskocikličnog zamora. Konstruisane krive
su međusobno poređene, a ocenjen je uticaj izbora karakterističnih
stabilizovanih histereza na karakterizaciju ponašanja čelika NN-70. Rezultati
eksperimentalnih ispitivanja su nam dali važne podatke o razumevanju
zamornog ponašanja čelika NN-70. U radu je izvršeno i poređenje rezultata
statičkog i dinamičkog, odnosno monotonog i zamornog ponašanja materijala,
što predstavlja praktični doprinos oceni ponašanja čelika NN-70 u uslovima
delovanja niskocikličnog zamora.
Ključne reči: HSLA, NN-70, LCF, ISO, ASTM, MSS, MpNDT.
84 Institut za ispitivanje materijala a.d. Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 85
T 002
CONSTRUCTION
TECHNOLOGY
T 002
GRAĐEVINSKA
TEHNOLOGIJA
86 Institut za ispitivanje materijala a.d. Beograd
RAD U ČASOPISU MEĐUNARODNOG
ZNAČAJA VERIFIKOVANOG POSEBNOM
ODLUKOM (M24)
D. Bojović, B. Aranđelović, K. Janković, A. Senić, M. Stojanović
DETERMINATION OF THE IN-SITU COEFFICIENT OF FRICTION
AND IMPERFECTION OF PRESTRESSING CABLES
Građevinski materijali i konstrukcije, Vol. 60, No. 2, 2017, 49-56
Prestressing structural elements allows an increase in the spans of reinforced
concrete structures. In the design and dimensioning of prestressed reinforced
concrete structures it is necessary to know, that is to adopt a number of
parameters which are empirically determined. Determining the level of the
tension force of the cables is of primary importance for prestressed structures.
The level of tensioning force, in addition to other parameters, greatly depends
on the friction coefficient of cables and the imperfection coefficient of
execution. These coefficients are defined by standards for the design or by the
manufacturer of the prestressing system. The coefficients are defined in wide
ranges, while for the design, the knowledge of the most accurate values is
necessary in order to obtain a good design and cheaper structures. Through
experimental work in-situ the range of the values of the coefficient of friction of
cables is determined and compared with ranges defined by the standard.
Keywords: prestressing, coefficient of friction, coefficient of imperfection.
Pregled naučnih i stručnih rezultata u 2017. godini 87
SAOPŠTENJE SA SKUPA NACIONALNOG
ZNAČAJA ŠTAMPANO U CELINI (M63)
Z. Radojević, M. Vasić, V. Milošević
PRIKAZ RAZLIČITIH METODOLOGIJA ISPITIVANJA KLIZAVOSTI
KERAMIČKIH PLOČICA
XXVII međunarodni simpozijum o istraživanjima i primeni savremenih
dostugnuća u građevinarstvu u oblasti materijala i konstrukcija, Vršac, 2017,
75-81.
U Srbiji poslednjih godina traje proces usaglašavanja sa EU tehničkom
regulativom vezanom za zahteve za stavljanje proizvoda na tržište. Zahtevi za
građevinske proizvode i objekte iz Uredbe 305/11 prevashodno se odnose na
bezbednost. Objekti kao celine i njihovi sastavni delovi moraju da odgovaraju
svojoj predviđenoj nameni, uzimajući u obzir zdravlje i bezbednost ljudi tokom
čitavog životnog ciklusa tih objekata. Jedan od zahteva koji se postavlja za
podove uključujući i podove obložene keramičkim pločicama se odnosi na
otpornost prema klizanju. U ovom radu su prikazane četiri metode, definisne u
odgovarajućim prilozima standarda CEN/TS 16165, koje se odnose na
utvrđivanje otpornosti prema klizanju. Metodu prikazanu u prilogu A treba
koristiti za ispitivanje podnih obloga koje koriste pešaci koji hodaju bosi.
Metode prikazane u prilozima B, C i D treba koristiti za ispitivanje podnih
obloga koje mogu biti suve/ili mokre a koje koriste pešakaci koji hodaju
obuveni. U radu su dodatno predstavljeni i kriterijumi za ocenu otpornosti
prema klizanju podnih obloga, na osnovu kojih se oni razvrstavaju u
odgovarajuće kategorije.
Ključne reči: keramičke pločice, klizavost, dinamički koeficijent trenja.
88 Institut za ispitivanje materijala a.d. Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 89
P 420
PETROLOGY,
MINERALOGY,
GEOCHEMISTRY
P420
PETROLOGIJA,
MINERALOGIJA,
GEOHEMIJA
90 Institut za ispitivanje materijala a.d. Beograd
SAOPŠTENJE SA MEĐUNARODNOG SKUPA
ŠTAMPANO U CELINI (M33)
I. Delić-Nikolić, L. Kurešević, O. Vušović
KOSJERIĆ DIABASE AS BUILDING STONE
1st International Conference on Construction Materials for Sustainable Future,
Zadar, Croatia, 2017, 140-145.
Diabase is an old name for a magmatic effusive and vein rock, which is
regarded a highly-prized building material due to its good technical properties.
It has high values of compressive strength and abrasion resistance, small water
absorption and it is resistant to frost impact. Despite all this, in Serbia, diabase
did not receive the deserved attention as a building material. Thorough
geological exploration performed in the period from 2003 to 2009 in six
locations in the territory around Kosjerić (western Serbia) aimed to prove
geological reserves and quality of diabase rocks, mostly for use as an aggregate
in road-construction. All explored localities are situated on Maljen Mt. and
belong to diabase-chert formation (ophiolitic melange) of the Mesozoic age.
Ophiolitic melange is situated within the chain of Podrinje-Valjevo mountains,
formed in the unstable geologic structure together with other basic and
ultramafic rocks, and contemporaneous with surrounding sedimentary
formations. Most often, diabase forms large masses of submarine effusions, up
to several hundred meters thick. These masses most often are trending NW-SE.
Conducted exploration works found that the rock mass is homogeneous and
sound in all localities, although with dense joint networks filled with white
quartz veins, or rarely with calcite veins. The exploration works included
numerous laboratory examinations of petrological and technical properties.
These have shown that the main minerals belong to plagioclase and pyroxene
groups. Subordinate components are opaque minerals and, rarely, quartz.
Chlorite, epidote and calcite have formed as secondary minerals in various
alteration processes. Rock texture is most often ophitic, and the structure
homogeneous. Testing of the technical properties has proved high quality of the
stone from these localities and its possibility of use as a building material. The
presence of two colour varieties is detected: dark grey and dark green. However,
no differences in the technical properties of the two varieties have been found.
Pregled naučnih i stručnih rezultata u 2017. godini 91
Keywords: diabase, Kosjerić, building stone.
I. Delić-Nikolić, O. Vušović, L. Kurešević
TESTING OF STONE FROM THE FACADE OF THE CATHEDRAL OF
SAINT TERESA IN SUBOTICA
Assessment, maintenance and rehabilitation of civil structures and settlements,
X international conference, Vršac, 2017, 565-572.
Saint Teresa cathedral in Subotica is built by the end of the 18th century, and has
since suffered significant damage. One of the damage types is the intense decay
of the plinth mortar, which led to outcropping of the light-coloured stone the
plinth is built from. This stone has been examined as part of the restoration
process on this cathedral, aiming to determine the state of the building materials
used for building the cathedral. These examinations included the visual
examination of the stone, in situ determination of the water absorption via
Karsten tubes, sampling for laboratory examinations and the laboratory
examinations: petrographic analysis and determination of the chosen physical
properties. We provide conclusions based on the results of all the cited
examinations.
Keywords: cathedral, facade, Subotica, stone testing.
92 Institut za ispitivanje materijala a.d. Beograd
RAD U VODEĆEM ČASOPISU
NACIONALNOG ZNAČAJA (M51)
L. Kurešević, O. Vušović, I. Delić-Nikolić
GEOLOGY OF GEMSTONE DEPOSIT UGLJAREVAC (CENTRAL
SERBIA) AND CONTRIBUTIONS TO GENETIC MODEL
Geologica Macedonica, Vol. 31, No. 1, 2017, 67-76.
Silica gemstone deposit Ugljarevac is situated within the ophiolite sequence of
the Vardar zone central deep fault. Genetic processes of this deposit are
connected to the Neogene calc-alkaline magmatic activity of the Vardar zone
and hydrothermal activity triggered by it. Based on surface occurrences of
listwenitized serpentinite containing silica mineralization, it can be inferred that
the ore body is an elongated oval stock. Within the stock of hydrothermally
altered serpentinite, the gemstone mineralization occurs as veins, stockworks
and irregular bodies.
Present gemstone types include chalcedony varieties (jasper, colourless and
greenish chalcedony, carnelian and sard) and opal (opalized serpentinite).
Homogenous pieces are very rare. Most often, various types of silica are
intimately intermixed and combined. The mineralization has formed in two
distinct hydrothermal phases, apparently in close time succession. Jasper and
coloured chalcedony (and rare magnesite) are the products of the first phase of
hydrothermal activity, while the colourless chalcedony is formed in the second
phase. Newly discovered type of silica vein with central-symmetrical parallel
banding gives new contributions to a genetic model, proving the precipitation
process and its products are unpredictably changeable, heterogeneous and
depending on the evolution of the local environment physico-chemical
conditions, notably the contents of impurities and system's openness degree.
Keywords: gemstone; silica veins; jasper; chalcedony; central Serbia.
Pregled naučnih i stručnih rezultata u 2017. godini 93
DOCTORAL DISSERTATIONS DOKTORSKE DISERTACIJE
94 Institut za ispitivanje materijala a.d. Beograd
J. Ćirilović
INTEGRISANI MODEL UPRAVLJANJA FLEKSIBILNIM
KOLOVOZIMA NA NIVOU MREŽE
Doktorska disertacija odbranjena na Građevinskom fakultetu Univerziteta u
Beogradu 2017. godine
Poslednjih godina, preduzeća koja se bave održavanjem putne infrastrukture, na
državnom i lokalnom nivou, se suočavaju sa novim zahtevima kada je reč o
održavanju puteva. Pored potrebe da se smanje ukupni troškovi održavanja
putne mreže i usklade sa realnim mogućnostima i raspoloživim budžetom, i da
se u isto vreme obezbedi održavanje putne mreže u odgovarajućem i stabilnom
stanju, preduzeća koja upravljaju putnom infrastrukturom se nalaze pred još
zahtevnijim izazovom, a to je uključivanje klimatskih promena i uticaja na
životnu sredinu u proces odlučivanja. Mnoge studije i istraživački projekti su
istraživali uticaj stanja kolovoznog zastora na potrošnju goriva i troškove
održavanja. Rezultati pokazuju da bi održavanje kolovoza, na nivou putne
mreže, na najnižem nivou ravnosti smanjilo potrošnju goriva i rezervnih delova
vozila, što je takođe korisno i za životnu sredinu. S druge strane, intenzivni
radovi održavanja, koji su neophodni kako bi putevi bili u odličnom stanju
ravnosti, praćeni su značajnim emisijama i negativnim uticajem na životnu
sredinu. Cilj ovog istraživanja je bio da se integrišu model procene troškova,
optimizacioni model održavanja i modeli uticaja na životnu sredinu, kako bi se
adekvatno odgovorilo savremenim zahtevima, koji uključuju razvoj i primenu
strategija koje nisu samo ekonomski, već i ekološki održive. Primenjen
optimizacioni model je zasnovan na metodi „exhaustive search“, a kasnije je
primenjena višekriterijumska optimizacija sa upotrebom genetskih algoritama,
dok su modeli procene troškova razvijeni korišćenjem regresione analize,
stabala odlučivanja i veštačkih neuronskih mreža. Razvijena metodologija
nalazi optimalan plan održavanja putne mreže R Srbije, tj rešenje koje je i
ekonomski i ekološki opravdano. Međutim, primenjena metodologija može lako
da se primeni na bilo koju drugu putnu mrežu širom sveta.
Ključne reči: Održavanje puteva, asfaltni kolovozi, strategije održavanja,
metode optimizacije, metode procene troškova, putna mreža, emisije ugljen
dioksida.
Pregled naučnih i stručnih rezultata u 2017. godini 95
D. Bojović
PARAMETARSKA ANALIZA NOSIVOSTI ANKERA NA ZATEZANJE
I SMICANJE U MIKROARMIRANOM BETONU VEOMA VISOKIH
ČVRSTOĆA FAKTORIJALNOM ANALIZOM I NEURONSKIM
MREŽAMA
Doktorska disertacija odbranjena na Fakultetu tehničkih nauka Univerziteta u
Novom Sadu 2017. godine
Beton kao materijal u upotrebi je već više od jednog veka. Od nastanka do
danas razvijeni su različiti dodaci betonu koji su omogućili dobijanje različitih
vrsta betona. Razvojem hemijskih dodataka omogućeno je da se odnos vode i
cementa u betonu smanji na veoma nizak nivo. Kombinacijom određenih
komponentnih materijala i novih hemijskih dodataka mogu se dobiti betoni
visokih čvrstoća. Primenom mikrovlakana i posebnih tehnika nege u takvim
betonima omogućeno je dobijanje značajno većih čvrstoća. Takvi betoni se još
nazivaju betoni veoma visokih čvrstoća. Ovako dobijeni betoni omogućavaju
manje dimenzije konstrukcijskih elemenata, ali je njihova proizvodnja
neizbežno vezana za fabričke pogone. Njihovo spajanje na gradilištu je
najjednostavnije pomoću ankera koji se postavljaju tokom proizvodnje ili
naknadno.
Na početku izrade disertacije izvršen je detaljan pregled i analiza dostupne
literature i rezultata istraživanja iz oblasti betona veoma visokih čvrstoća i
ispitivanja ankera. Ova analiza data je u teorijskom delu disertacije.
Prvi deo eksperimentalnog istraživanja obuhvatio je dobijanje mikroarmiranih
betona veoma visokih čvrstoća. Na betonima veoma visokih čvrstoća
proizvedenim u laboratorijskim uslovima ispitane su osnovne
fizičko‐mehaničke karakteristike. Napravljene su četiri vrste betona i za svaku
vrstu preko 70 uzoraka za ispitivanje svojstava betona veoma visokih čvrstoća.
Nakon toga formirani su uzorci za ispitivanje nosivosti ankera. I to 144
betonska uzorka u kojima su prethodno ugrađeni ankeri i 144 betonska uzorka u
kojima su naknadno ugrađeni ankeri sa "SIKA" materijalima.
Za ispitivanje nosivosti ankera na zatezanje primenjena je standardna metoda,
dok je za ispitivanje nosivosti ankera na smicanje primenjena interna metoda.
96 Institut za ispitivanje materijala a.d. Beograd
Na osnovu dobijenih rezultata ispitivanja formirane su baze podataka. Analiza
rezultata ispitivanja obuhvatila je sve pojedinačne rezultate i definisanje
zavisnosti između nosivosti ankera na zatezanje i smicanje i variranih
parametara.
Radi egzaktnog utvrđivanja pojedinačnog uticaja analiziranih parametara, kao i
njihovog kombinovanog uticaja, pored standardnih statističkih numeričkih
analiza, primenjena je i analiza pomoću faktorijalnog eksperimenta, kao i
analiza primenom neuronskih mreža.
Zaključeno je da oba pristupa imaju svoje prednosti. Rezultati koji su dobijeni
pokazuju podudaranja u pojedinim delovima. Zbog načina obrade
podataka u različitim pristupima postoje i značajne razlike među njima.
Ključne reči: beton veoma visokih čvrstoća, ankeri, faktorijalna analiza i
neuronske mreže.
Pregled naučnih i stručnih rezultata u 2017. godini 97
ORGANIZATION
OF CONFERENCES ORGANIZACIJA
STRUČNIH SKUPOVA
98 Institut za ispitivanje materijala a.d. Beograd
MEĐUNARODNI SIMPOZIJUM
O ISTRAŽIVANJIMA I PRIMENI SAVREMENIH DOSTUGNUĆA
U GRAĐEVINARSTVU U OBLASTI MATERIJALA I KONSTRUKCIJA
I XXVII KONGRES DIMK
Vrsac, 18 – 20.10.2017.
Organizatori
Institut IMS Beograd
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije
Osnovni cilj Simpozijuma je da se stručnoj javnosti, kroz prijavljene referate,
saopšte rezultati aktuelnih istraživanja u Srbiji i zemljama regiona, kao i da se
proceni mogućnost praktične primene novih naučnih dostignuća u oblasti
građevinarstva.
Programski odbor koji je formirala Skupština DIMKS, predvideo je da Kongres
traje 3 dana po sledećim tematskim oblastima:
Istraživanja na području materijala i njihove primene;
Teorijska i eksperimentalna analiza konstrukcija;
Projektovanje i građenje objekata;
Aseizmičko projektovanje i građenje;
Održavanje i sanacija građevinskih objekata;
Materijali, konstrukcije i životna sredina;
Energetska efikasnost građevinskih objekata;
Građevinsko-tehnička regulativa i sistem kvaliteta;
Upravljanje projektima u građevinarstvu.
Pregled naučnih i stručnih rezultata u 2017. godini 99
SEDMO NAUČNO-STRUČNO MEĐUNARODNO SAVETOVANJE
GEOTEHNIČKI ASPEKTI GRAĐEVINARSTVA
Šabac, 14 – 17.11.2017.
Organizatori
Institut IMS Beograd
Savez građevinskih inženjera Srbije
Srpsko društvo za mehaniku tla i geotehničko inženjerstvo
SET d.o.o. Šabac
Savetovanje je imalo cilj da ukaže na orijentaciju glavnih pravaca razvoja ove
struke, koji treba da odgovaraju uslovima i potrebama u ovoj fazi izgradnje naše
zemlje.
Pored toga to je bila prilika da se razmotri i stanje naše regulative u ovoj oblasti
i potreba njenog usaglašavanja sa najnovijim dokumentima evrokodova koji se
odnedavno primenjuju u zemljama Evropske unije.
100 Institut za ispitivanje materijala a.d. Beograd
DESETO NAUČNO-STRUČNO MEĐUNARODNO SAVETOVANJE
OCENA STANJA, ODRŽAVANJE I SANACIJA GRAĐEVINSKIH
OBJEKATA I NASELJA
Vršac, 14 – 16.6.2017.
Organizatori
Institut IMS Beograd
Savez građevinskih inženjera Srbije
GP Rasing d.o.o. Vršac
Široka razmena iskustava stručnjaka različitih profila: građevinskih inženjera
različitih smerova, geotehničara, arhitekata, urbanista, prostornih planera,
ekonomista, pravnika i ostalih stručnjaka koji rade u graditeljstvu na pregledu,
ispitivanju i proceni stanja objekata i na projektovanju i izvođenju radova u
oblasti održavanja i sanacije građevinskih objekata i naselja.
Specifični geotehnički i seizmološki problemi naše zemlje i Balkana, socio-
ekonomski odnosi u društvu i drugi faktori, doveli su do zaostajanja za
razvijenim zemljama u oblasti tretmana postojećeg graditeljskog fonda.
To je nametnulo potrebu razvoja metodologija za procenu stanja postojećih
objekata i naselja, za izbor adekvatnog pristupa održavanju, sanaciji i
rekonstrukciji građevinskih objekata i naselja, uz uključivanje optimizacionih i
informacionih sistema u ove oblasti.
Pregled naučnih i stručnih rezultata u 2017. godini 101
RESEARCH PROJECTS
FINANCED BY THE
MINISTRY OF EDUCATION,
SCIENCE AND
TECHNOLOGICAL
DEVELOPMENT
NAUČNI PROJEKTI
FINANSIRANI OD STRANE
MINISTARSTVA
PROSVETE, NAUKE
I TEHNOLOŠKOG
RAZVOJA
102 Institut za ispitivanje materijala a.d. Beograd
NAUČNI PROJEKTI
FINANSIRANI OD STRANE MINISTARSTVA PROSVETE, NAUKE
I TEHNOLOŠKOG RAZVOJA
TEHNOLOŠKI RAZVOJ
Ev.
broj
Naziv projekta
35002 Razvoj novih metodologija
revitalizacje turbinske i
hidromehaničke opreme
hidroelektrana u zavisnosti od
uzroka degradacije materijala
Dr Miodrag Arsić,
rukovodilac projekta
Dr Vencislav Grabulov
Dr Zoran Odanović
36014 Geotehnički aspekti istraživanja
i razvoja savremenih tehnologija
građenja i sanacija deponija
komunalnog otpada
Dr Nenad Šušić,
rukovodilac projekta
Dr Ksenija Đoković
Bojan Ćosić
Jelena Ćirilović
36017 Istraživanje mogućnosti primene
otpadnih i recikliranih materijala
u betonskim kompozitima, sa
ocenom uticaja na životnu
sredinu, u cilju promocije
održivog građevinarstva u Srbiji
Dr Aleksandra Mitrović
Dr Ksenija Janković
Mr Dragan Bojović
Ljiljana Lončar
Marko Stojanović
35011 Integritet opreme pod pritiskom
pri istovremenom delovanju
zamarajućeg opterećenja i
temperature
Dr Dejan Momčilović
Mr Vujadin Aleksić
Pregled naučnih i stručnih rezultata u 2017. godini 103
35006 Održivost i unapređenje
mašinskih sistema u energetici i
transportu primenom
forenzičkog inženjerstva, eko i
robust dizajna
Dr Miodrag Arsić
35029 Razvoj metodologija za
povećanje radne sposobnosti,
pouzdanosti i energetske
efikasnosti mašinskih sistema u
energetici
Dr Dejan Momčilović
35040 Razvoj savremenih metoda
dijagnostike i ispitivanja
mašinskih struktura
Željko Flajs
INTEGRALNA I INTERDISCIPLINARNA ISTRAŽIVANJA
Ev.
broj
Naziv projekta
45008 Razvoj i primena
multifunkcionalnih materijala na
bazi domaćih sirovina
modernizacijom tradicionalnih
tehnologija
Dr Zagorka Radojević
Dr Anja Terzić
Dr Milica Arsenović
Dr Miloš Vasić
Ljiljana Miličić
Ivana Delić
104 Institut za ispitivanje materijala a.d. Beograd
OSNOVNA ISTRAŽIVANJA
Ev.
broj
Naziv projekta
186010 Minerali Srbije: sastav, struktura,
geneza, primena i doprinos
održanju životne sredine
Dr Snežana Dević
172005 Uticaj nano i mikrostrukturnih
konstituenata na sintezu i
karakteristike savremenih
kompozitnih materijala sa
metalnom osnovom
Dr Zoran Odanović
174004 Mikromehanički kriterijumi
oštećenja i loma
Dr Vencislav Grabulov
172057 Usmerena sinteza, struktura i
svojstva multifunkcionalnih
materijala
Dr Anja Terzić
Pregled naučnih i stručnih rezultata u 2017. godini 105
SELECTED
BUSINESS REFERENCES ODABRANE
STRUČNE REFERENCE
106 Institut za ispitivanje materijala a.d. Beograd
U ovom odeljku dat je pregled ključnih usluga koje je Institut IMS izvršio u
2017. godini.
U skladu sa multidisciplinarnom organizacijom Instituta, usluge obuhvataju
izradu investiciono-tehničke dokumentacije, ispitivanja na terenu i u
laboratorijama, stručni nadzor nad izvođenjem radova, studije, ekspertize i
drugo u praktično svim oblastima građevinarstva, mašinske industrije i
energetike.
Pregled referenci je dat po organizacionim celinama.
Pregled naučnih i stručnih rezultata u 2017. godini 107
THE CENTRE
FOR MATERIALS CENTAR
ZA MATERIJALE
108 Institut za ispitivanje materijala a.d. Beograd
CENTAR ZA MATERIJALE
Laboratorija za građevinsku keramiku
R.b. Referenca Investitor
1. Elaborat o oceni kvaliteta keramičkih glina
sa ležišta Brezaci i preporukama za primenu
u proizvodnji keramičkih pločica
KAOLIN a.d.
Valjevo
2. Elaborat o oceni kvaliteta opekarske sirovine
sa lokacije Zagorica, sa preporukama
receptura za primenu u ciglani u
Aranđelovcu
Univerzum-Kubršnica
a.d.
Aranđelovac
3. Elaborat o oceni kvaliteta opekarske sirovine
sa ležišta Crne bare-srednja strana crepane
IGM Polet, Novi Bečej
IGK Polet a.d.
Novi Bečej
4. Projekat optimizacije sirovinskih mešavina
za proizvodnju energetskih blokova u ciglani
MLADOST TMP, Mala Plana
MLADOST TMP,
Mala Plana
5. Studija o rezultatima dijagnosticiranja
temperaturnog režima rada tunelske peći sa
U kasetama, sa preporukama za optimizaciju
procesa pečenja u crepani DILJ d.o.o.
Vinkovci, Hrvatska
IGM DILJ d.o.o.
Vinkovci, Hrvatska
6. Studija o rezultatima dijagnosticiranja
temperaturnog režima rada tunelske peći,
sa preporukama za optimizaciju procesa
pečenja u crepani IGM Toza Marković,
Kikinda
IGM Toza Marković,
Kikinda
Pregled naučnih i stručnih rezultata u 2017. godini 109
Laboratorija za akustiku i vibracije
R.b. Referenca Investitor
1. Praćenje nivoa buke na teritoriji grada
Novog Sada, jul 2016 – jun 2017.
Grad Novi Sad,
Gradska uprava za
zaštitu životne sredine
2. Merenje nivoa buke u životnoj sredini duž
predložene trase budućih dalekovoda DV
2x400kV Bajina Bašta – granica BIH /
Višegrad – TS Požega i DV 400kV TS
Požega – TS Kraljevo 3
Mott MacDonald IPF
III Consortium,
Beograd
3. Merenje nivoa buke u životnoj sredini na
lokaciji KBC Bežanijska kosa u Beogradu
pre i posle postavljanja zvučnih barijera
CPG d.d.
Beograd
4. Merenje nivoa buke u životnoj sredini na
lokaciji Gradski zavod za hitnu medicinsku
pomoć u Beogradu pre i posle postavljanja
zvučnih barijera
CPG d.d.
Beograd
5. Merenje nivoa buke u životnoj sredini u zoni
uticaja kamenoloma Krst i duž trase puta
kojim se vrši transport kamenih agregata u
naselju Prijezdić kod Valjeva
Kamen desetka d.o.o.
Beograd
6. Merenje nivoa buke u životnoj sredini duž
predložene trase budućeg dalekovoda DV
2x400kV TS Bajina Bašta – TS Obrenovac
ENERGOPROJEKT
ENTEL a.d.
Beograd
7. Kontrolna merenja nivoa buke na teritoriji
grada Beograda, 2016 – 2017.
Grad Beograd,
Gradska uprava grada
Beograda,
Sekretarijat za
inspekcijske poslove
110 Institut za ispitivanje materijala a.d. Beograd
8. Merenje nivoa buke u životnoj sredini u
okolini lokacije TE Kolubara A, Veliki
Crljeni
JP Elektroprivreda
Srbije, Beograd
9. Merenje nivoa buke u životnoj sredini u
okolini lokacije TENT A, Obrenovac
JP Elektroprivreda
Srbije, Beograd
10. Merenje nivoa buke u životnoj sredini u
okolini lokacije TENT A, Obrenovac
JP Elektroprivreda
Srbije, Beograd
11. Veliki broj standardnih merenja nivoa buke,
zvučne izolacije i zvučne apsorpcije na
terenu i u laboratoriji
Laboratorija za kamen i agregat
R.b. Referenca
1.
Laboratorijska ispitivanja uzoraka tehničkog i arhitektonskog kamena,
šljunka i peska u cilju realizacije geoloških istraživanja ležišta
2. Ispitivanje tehničkog i arhitektonskog kamena, ispitivanje kamenih
agregata, atestiranje kamenih agregata, ispitivanje na prisustva azbesta
3. Ispitivanje materijala sa kulturno-istorijskih spomenika:
istorijski malter sa tvrđave Novo brdo, Kosovo i Metohija,
istorijski malter sa manastira Treskavac u Makedoniji,
istorijski malter sa zgrade Jugoeksporta u Kolarčevoj ulici
u Beogradu,
istorijski malter sa zgrade Starog načelstva u Požarevcu,
kamen ugrađivan u objekte od istorijskog značaja:
dečija klinika uTiršovoj ulici u Beogradu, Kalenić pijaca u Beogradu,
zgrada Starog načelstva u Požarevcu i dr.
Pregled naučnih i stručnih rezultata u 2017. godini 111
Laboratorija za beton
R.b. Referenca Investitor
1.
Završne ocene kvaliteta betona za objekte
izvedene u Srbiji
Širbegović grupa –
GMT Konstrukcije,
Gračanica, BiH
2. Kontrola kvaliteta ugrađenih materijala
tokom izvođenja radova na autoputu E-80,
deonica Čiflik-Staničenje
Construcctiones Rubau
– Ogranak Niš
3. Kontrola kvaliteta betona na gradilištu
Paralelni put Bela Palanka – Pirot
Ferbild
4. Tekuća kontrola kvaliteta betona na
gradilištu Autoput E-763, deo 3:
Obrenovac – Ub
China Shandong
International Economic
& Technical,
Ogranak Beograd
5. Kontrola kvaliteta materijala na
građevinskom objektu: izgradnja autoputa
E-75, deonica LOT 3 – tunel Predejane i
LOT 4 – tunel Manajle
Euro Alliance Tunnels
JSC
– Ogranak Beograd
6. Kontrola kvaliteta na deonici autoputa E-75
Grdelica – Caričina Dolina Azvi
7. Kontrola kvaliteta na deonici autoputa E-75
Caričina Dolina – tunel Manajle Ogranak Prijedor-
putevi B Beograd
8. LOT B3.2 Izgradnja Ostružničkog mosta
u konzorcijumu sa UTIBER, Mađarska
JP Putevi Srbije
9. Završne ocene kvaliteta betona za objekte
izvedene u Srbiji
Baupartner,
Lukavac, BiH
112 Institut za ispitivanje materijala a.d. Beograd
10. Nezavisna laboratorija za ispitivanje betona
na izgradnji Autoputnog pravca E75,
Deonica: Grdelica (gornje Polje) – Caričina
Dolina, LOT2: Put i mostovi od Tunela
Predejane do Caričine Doline
Trace
– Ogranak Beograd
11. Ispitivanje betona na mostu preko Save
od stacionaže km 22+516 do km 24+097
China communications
Construction Company
LTD.
Ogranak Beograd
– Savski venac
12. Kontrola kvaliteta na objektu Vetropark
Čibuk 1 – Dolovo CJR
Pregled naučnih i stručnih rezultata u 2017. godini 113
THE CENTRE
FOR METALS
AND ENERGETICS
CENTAR
ZA METALE
I ENERGETIKU
114 Institut za ispitivanje materijala a.d. Beograd
CENTAR ZA METALE I ENERGETIKU
Laboratorija za ispitivanje metala
Kontrolno telo
Laboratorija za etaloniranje mehaničkih veličina
R.b. Referenca Investitor
1. Fabrički prijem opreme od strane instituta
pri izradi i sanaciji delova hidroagregata
u fabrici LMZ, Silovie Mašini, Rusija
JP EPS BEOGRAD
Ogranak HE Đerdap
HE Đerdap 1 Kladovo
2. Ispitivanje mašinske opreme JP EPS BEOGRAD
Ogranak HE Đerdap
HE Đerdap 1 Kladovo
3. Ispitivanje opreme bez razaranja HMO
– HE PIROT
JP EPS BEOGRAD
Ogranak HE Đerdap
HE Pirot, Pirot
4. Ispitivanje materijala sa razaranjem JP EPS BEOGRAD
Ogranak RB Kolubara
Kolubara metal,
Lazarevac
5. Ispitivanje glavnih parovodnih linija RA,
RB i RC i ispitivanje prestrujnih parovoda
metodama bez razaranja za 2017.
TENT A, blokovi A1, A2 i A6
JP EPS BEOGRAD
Ogranak TE Nikola
Tesla A, Obrenovac
6. Ispitivanje turbinske opreme
Ispitivanje NDT metodama (lopatice,
vretena, ležajevi...) za remont 2017.
blokovi A1, A2, A3,A5 i A6
JP EPS BEOGRAD
Ogranak TE Nikola
Tesla A, Obrenovac
Pregled naučnih i stručnih rezultata u 2017. godini 115
7. Ispitivanje metodama bez razaranja opreme
agregata, hidromehaničke opreme i uređaja
na nivou ogranka DLHE
– HE Elektromorava
JP EPS BEOGRAD,
Ogranak Drinsko
Limske HE – Bajina
Bašta – OJ HE
Elektromorava Čačak
8. Ispitivanje metala sa i bez razaranja JP EPS BEOGRAD
Ogranak TE KO
Kostolac, Kostolac
9. Ispitivanje preostalog radnog veka ventila
koji rade u kritičnim uslovima – TENT A
JP EPS BEOGRAD
Ogranak TE Nikola
Tesla A, Obrenovac
10. Priprema i ispitivanje stanja materijala na
bloku 6
JP EP Bosne i
Hercegovine d.d.
Sarajevo
11. Ispitivanja metodama bez razaranja na
opremi koja je vlasništvo Elektroprivrede
BiH, a nalazi se u fabrici Đuro Đaković
– Strojna obrada d.o.o. Slavonski Brod,
Republika Hrvatska
Tehnopetrol d.o.o.
Tuzla
12. Ispitivanje kvaliteta čelične konstrukcije
hladnjače Ledo metodama bez razaranja i
ispitivanje metodama sa razaranjem
Ledo d.o.o.
Podgorica
13. Ispitivanje hemijskog sastava i mehaničkih
osobina materijala
Thyssenkrupp
Materials d.o.o. Inđija
Proleter a.d. Metalska
industrija, Arilje
Paffoni d.o.o.
Mladenovac
Manet d.o.o. Beograd
Aqua Mont Service
d.o.o. Beograd
116 Institut za ispitivanje materijala a.d. Beograd
14. Ispitivanje betonskog čelika Metalfer Steel Mill
d.o.o. Sremska
Mitrovica
Eurokomerc-Company
d.o.o. Bujanovac ,
Komerc-Mali d.o.o.
Prnjavor
Strabag, d.o.o.
Beograd
15. Ispitivanje mehaničko-tehnoloških osobina
vijaka, navrtki i podloški
Markant, Valjevo
DIV betonski pragovi,
Svrljig
16. Ispitivanja proizvoda od gvožđa i čelika
(armatura, užad za prednaprezanje, cevi...)
Ogranak Terna S.A.
Serbia, Beograd
JP za podzemnu
eksploataciju uglja,
Resavica
Aktor A.T.E,
Ogranak Beograd
AD Putevi, Užice
Pregled naučnih i stručnih rezultata u 2017. godini 117
118 Institut za ispitivanje materijala a.d. Beograd
17. Etaloniranje uređaja za merenje mehaničkih
veličina
EPS Beograd,
Ogranak RB Kolubara,
Poliester, Priboj,
La Farge, Beočin,
Azvirt, Beograd,
Železara Smederevo,
JAT Tehnika, Beograd,
Lasta, Beograd,
Energoprojekt
niskogradnja, Beograd,
Elita – Cop d.o.o.
Zemun,
Hemofarm a.d. Vršac,
GP Mostogradnja a.d.
Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 119
THE CENTRE
FOR ROADS
AND GEOTECHNICS
CENTAR
ZA PUTEVE
I GEOTEHNIKU
120 Institut za ispitivanje materijala a.d. Beograd
CENTAR ZA PUTEVE I GEOTEHNIKU
Nadzor Investitor
1. Nadzor na deonici LOT B3 izgradnja mosta br.8
preko reke Save kod Ostružnice, Obilaznica oko
Beograda
JP Putevi Srbije
2. Geodetski nadzor tokom građevinskih radova na
izgradnji deonice koridora XI, Surčin-Obrenovac
Falcon Survey
d.o.o.
Dinamičko ispitivanje šipova - DLT metoda Investitor
1. Izveštaj o ispitivanju šipova sa čeličnom
kolonom metodom DLT za objekat –
Obaloutvrde, kaskadne terase, lokacija Beograd
na vodi, Beograd
Millenium Team
d.o.o. Beograd
2. Izveštaj ispitivanje šipova P15 i P3 sa čeličnom
kolonom metodom DLT za objekat –
Obaloutvrda na desnoj obali reke Save od km
1+000 do km 3+000 (Brezov mol), lokacija
Beograd na vodi, Beograd
Millenium Team
d.o.o. Beograd
3. Izveštaj o ispitivanju nosivosti šipova
dinamičkim probnim opterećenjem (DLT) na
trgu Slavija, u Beogradu
Geosonda
Fundiranje a.d.
Beograd
4. Izveštaji I i II o ispitivanju nosivosti šipova
dinamičkim probnim opterećenjem (DLT) za
temelje vetroturbine na lokaciji Vetroparka
Malibunar VG 24 i VG 25
Geosonda
Fundiranje a.d.
Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 121
5. Izveštaji I i II o ispitivanju nosivosti šipova
dinamičkim probnim opterećenjem (DLT) za
fabriku Mitas, u Rumi
Geosonda
Fundiranje a.d.
Beograd
6. Izveštaj o ispitivanju nosivosti šipa dinamičkim
probnim opterećenjem (DLT) za fabriku Patent
Co, u Mišićevu
Geosonda
Fundiranje a.d.
Beograd
7. Izveštaj o ispitivanju nosivosti šipa dinamičkim
probnim opterećenjem (DLT) za: maloprodajni
objekat Lidl, f0123 Ada – Beograd
ENERGOGROUP
d.o.o. Beograd
Ispitivanje integriteta šipova - SIT metoda
1. Izveštaj o ispitivanju integriteta šipova metodom
Sonic Integrity Testing SIT (u svemu prema:
ASTM D5882) za objekat Plot 18, Beograd na
vodi
STRABAG d.o.o.
2. Izveštaj o rezultatima ispitivanja integriteta
šipova metodom SONIC INTEGRITY
TESTING (SIT) za Potporni zid S3 – šipovi 53-
64 i 114-116 i Potporni zid S2 – šipovi 166-
170,na Koridoru H, LOT 5: Putevi i mostovi na
poddeonici Caričina dolina – Tunel Manajle
Ogranak Prijedor
putevi
3. Izveštaji I i II o ispitivanju integriteta šipova
metodom SONIC INTEGRITY TESTING SIT
(u svemu prema: ASTM D5882) za objekat:
most 17 Jabuka i Most 14 Uvač, Autoput Bar –
Boljare,Deonica Smokovac – Mateševo
ABG TEST d.o.o.
Podgorica,
Crna Gora
4. Izveštaj o ispitivanju integriteta šipova metodom
Sonic Integrity Testing SIT (u svemu prema:
ASTM D5882) za: Most 3, stubno mesto P5R na
autoputu E-75, LOT 1, deonica: Grdelica
(Gornje Polje) – Predejane (Caričina Dolina)
AZVI S.A.
Ogranak Novi Sad
122 Institut za ispitivanje materijala a.d. Beograd
5. Izveštaj o rezultatima ispitivanja integriteta
šipova metodom SONIC INTEGRITY
TESTING (SIT) za Potpornu konstrukciju na
desnoj traci državnog IB br.24 Batočina –
Kragujevac od km 13+423.00 do km 13+498.50
Preduzeće za
puteve Kragujevac
d.o.o.
Statičko ispitivanje šipova - SLT metoda
1. Izveštaj o ispitivanju test VG 24 franki šipa
metodom statičkog probnog opterećenja za
temelje vetrotubina – VG 24,na lokaciji
Vetroparka Malibunar
Geosonda
Fundiranje a.d.
Beograd
2. Izveštaj o ispitivanju šipova dinamičkim i
statičkim probnim opterećenjem za objekat
ʺNeltʺ, u Dobanovcima
Geosonda
Fundiranje a.d.
Beograd
3. Izveštaj o ispitivanju test VG 22 franki šipa
metodom statičkog probnog opterećenja za
temelje vetrotubina – VG 22, na lokaciji
vetroparka Košava, Izbište
Geosonda
Fundiranje a.d.
Beograd
4. Izveštaj o ispitivanju test VG 14 franki šipa
metodom statičkog probnog opterećenja za
temelje vetroturbina – VG 7,14, i 20 na lokaciji
vetroparka Alibunar
Geosonda
Fundiranje a.d.
Beograd
5. Izveštaj o ispitivanju franki šipa ø 600 mm
opitom statičkog probnog opterećenja
vertikalnom silom pritiska za objekat:
Postrojenje za prečišćavanje otpadnih voda, u
Vrbasu
Javornik d.o.o.
Subotica
Pregled naučnih i stručnih rezultata u 2017. godini 123
124 Institut za ispitivanje materijala a.d. Beograd
Projekti sanacije klizišta
1. Projektno-tehnička dokumentacija za sanaciju
klizišta – oštećenja nasipa trupa puta na
državnom putu IB-23, deonica br. 02328, Nova
Varoš - Bistrica, km 220+850
JP Putevi Srbije
2. Projektno-tehnička dokumentacija za sanaciju
klizišta – oštećenja kolovoza i nasipa na
državnom putu IB-22, deonica br. 02212,
Dudovica – Poljanice, km:63+125 - km:63+323
JP Putevi Srbije
3. Projektno-tehnička dokumentacija za sanaciju
klizišta – nestabilne kosine useka na državnom
putu IA-1, deonica br. 1089, Pojate-Ražanj, uža
lokacija Mečka, km:382+350
JP Putevi Srbije
4. Projektno-tehnička dokumentacija za sanaciju
klizišta–nasipa trupa puta,na državnom putu IB-
22, deonica br. 02234, Novi Pazar (Brđani)-
Ribariće, u mestu Orlje,km:276+480
JP Putevi Srbije
5. Projektno-tehnička dokumentacija za sanaciju
klizišta – oštećenja betonske potporne
konstrukcije na državnom putu IB-23,
deonica br. 02317: Pakovraće (Markovica) –
Kratovska stena, km: 104+068
JP Putevi Srbije
6. Projektno-tehnička dokumentacija za sanaciju
klizišta - oštećenja nasipa trupa puta na
državnom putu IB-23, deonica puta br. 02328,
Nova Varoš – Bistrica, km: 209+850
JP Putevi Srbije
Pregled naučnih i stručnih rezultata u 2017. godini 125
126 Institut za ispitivanje materijala a.d. Beograd
Geotehnički elaborati
R.b. Referenca Investitor
1.
Geotehnički elaborat o uslovima izgradnje
fabrike za kompletiranje streljačke, sportske
i lovačke municije u Užicu, KP 743/1, KO
Ljubanje
Prvi partizan, Užice
2. Elaborat o geotehničkim uslovima
fundiranja mosta Šlajz – šumska uprava
Kovilj u Kovilju – za nivo glavnog projekta
JP Vojvodinašume,
Novi Sad
3. Elaborat o geotehničkim uslovima
fundiranja mosta Kraljica –gazdinska
jedinica Plavanjske šume, Plavna
– za nivo glavnog projekta
JP Vojvodinašume,
Novi Sad
4. Geotehnički elaborat o uslovima izgradnje
fabrike za kompletiranje streljačke, sportske
i lovačke municije u Užicu, KP 743/1, KO
Ljubanje
JP Vojvodinašume,
Novi Sad
Pregled naučnih i stručnih rezultata u 2017. godini 127
THE CENTRE FOR
STRUCTURES
AND PRESTRESSING
CENTAR ZA
KONSTRUKCIJE
I PREDNAPREZANJE
128 Institut za ispitivanje materijala a.d. Beograd
CENTAR ZA KONSTRUKCIJE
I PREDNAPREZANJE
Odeljenje za prednaprezanje
R.b. Referenca Investitor
1.
Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju prilazne
konstrukcije desne obale mosta preko reke Save
kod Ostružnice, na autoputu E70/E75:
Dobanovci – Bubanj Potok, Obilaznica oko
Beograda.
STRABAG d.o.o
Beograd
DINARIK d.o.o.
Ogranak Beograd
2. Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju prilazne
konstrukcije leve obale (polja L6-L16-S1) mosta
preko reke Save kod Ostružnice, na autoputu
E70/E75: Dobanovci – Bubanj Potok, Obilaznica
oko Beograda.
STRABAG d.o.o.
Beograd
GP NIKOLIĆ
d.o.o. Kraljevo
3. Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju prilazne
konstrukcije leve obale (polja L1-L6) mosta
preko reke Save kod Ostružnice, na autoputu
E70/E75: Dobanovci – Bubanj Potok, Obilaznica
oko Beograda.
STRABAG d.o.o.
Beograd
UDARNIK
GRADNJA d.o.o.
Beograd
4. Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju za potrebe
sanacije temelja „D20” prilazne konstrukcije
desne obale mosta preko reke Save kod
Ostružnice, na autoputu E70/E75: Dobanovci –
Bubanj Potok, Obilaznica oko Beograda.
STRABAG d.o.o.
Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 129
130 Institut za ispitivanje materijala a.d. Beograd
5. Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju montažnih
nosača Prilazne saobraćajnice na gornjem
staničnom trgu železničke stanice „Beograd
Centar”.
STRABAG d.o.o.
Beograd
GP NIKOLIĆ
d.o.o. Kraljevo
6. Inženjerig usluge prilikom ugradnje, injektiranja
i prednaprezanja geotehničkih sidara i ankera,
kao i ispitivanje istih, za potrebe stabilizacije
kosina „Mrtvica 1”, „Mrtvica 2”, „Mrtvica 0” i
„Momin Kamen”, na autoputu E-75, deonica
Caričina dolina – Vladičin Han, lot 5,
poddeonica Caričina dolina – Tunel Manajle
Integral
Inženjering
Ogranak Niš
Vektor Integra
Sarajevo,
Ogranak Beograd
7. Inženjerig usluge prilikom prednaprezanja
geotehničkih sidara i ispitivanje geotehničkih
sidara, za potrebe stabilizacije kosina na autoputu
E-75, deonica Gornje polje – Tunel Predejane,
LOT 1
AZVI S.A.
Ogranak Novi Sad
8. Prednaprezanje i ispitivanje geotehničkih sidara
za potrebe stabilizacije kosina na izlaznim
profilima tunela Predejane, na autoputu E-75,
deonica Grdelica - Caričina dolina, LOT 3
EURO ALIANCE
TUNNELS JSC
Ogranak Beograd
UNOGRADNJA
V.V. d.o.o.
Beograd
9. Ispitivanje geotehničkih sidara na potpornom
zidu autoputa E-75, deonica Gornje Polje –
Caričina dolina, LOT 2
TRACE GROUP
HOLD PLC
Ogranak Beograd
F. HYČA S.R.O.
10.
Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju nosača u I
fazi, mosta preko železničke pruge, kanala i
lokalnog puta, na km 27+241, na autoputu E-
763, deonica Obrenovac - Ub
SHANDONG HI-
SPEED GROUP
PENTA GE CO
CONSTRUCTION
d.o.o. Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 131
132 Institut za ispitivanje materijala a.d. Beograd
11.
Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju konstrukcije
mosta na km 29+789 autoputa E-80: Niš –
Dimitrovgrad, deonica: Bancarevo – Crvena
Reka
AKTOR SERBIA
12.
Primena sistema prednaprezanja SPB i SPB
SUPER i utezački radovi na osiguranju obalnih
stubova prilikom sanacije mosta „Morača” na
km 424+978 na pruzi Vrbica – Bar u Crnoj Gori
FIDIJA” d.o.o.
Podgorica
Geosonda
Konsolidacija
Podgorica
DIORIT SRB
d.o.o. Beograd
13. Prednaprezanje i ispitivanje geotehničkih sidara
za potrebe stabilizacije klizišta na kosini iskopa
za pristupne puteve brane i akumulacije „Arilje”,
profil „Svračkovo”
Hidrotehnika
– Hidroenergetika
a.d. Beograd
14. Prednaprezanje i ispitivanje geotehničkih sidara -
zatega za potrebe izgradnje pristaništa
„Kostolac”
AQUA MONT
SERVICE d.o.o.
Beograd
15. Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju konstrukcije
za potrebe sanacije produženog nadvožnjaka na
državnom putu I-B reda, br. 12, na deonici Novi
Sad - Kać
ŽGP GP Beograd
d.o.o. Beograd
16. Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju konstrukcije
za potrebe sanacije nadvožnjaka preko
železničkih pruga Beograd – Niš i Trzpale -
Popovac, na autoputu Beograd – Niš, kod
Trupala
ŽGP GP Beograd
d.o.o. Beograd
Pregled naučnih i stručnih rezultata u 2017. godini 133
134 Institut za ispitivanje materijala a.d. Beograd
17. Primena sistema prednaprezanja SPB i SPB
SUPER i radovi na prednaprezanju konstrukcije
za potrebe sanacije mosta preko kanala DTD na
putu Odžaci – Bački Gračac
West Gradnja
d.o.o. Šabac
18. Primena OVM sistema prednaprezanja i radovi
na prednaprezanju konstrukcije mosta „Rišice”
kod Zenice i BiH, na koridoru „Vc”
EURO-ASFALT
d.o.o. Sarajevo
PONT d.o.o.
Sarajevo
DIORIT d.o.o.
Sarajevo
19. Ispitivanje sile u kablovima sandučastog
prstenastog nosača hale 1 Beogradskog sajma
JP Beogradski
sajam
20. Specijalistički stručni nadzor rada pogona za
adheziono prednaprezanje elemenata „Martini
Gradnja”
Martini Gradnja
d.o.o. Inđija
Pregled naučnih i stručnih rezultata u 2017. godini 135
136 Institut za ispitivanje materijala a.d. Beograd
Odeljenje za sanacije, projektovanje
i nadzor
R.b. Referenca Investitor
1. Glavni pregled i Elaborat o stanju
konstrukcije pločastog prepusta na km
6+148 na obilaznici oko Brčkog
RUBAU d.o.o Brčko
2. Glavni pregled i Elaborat o stanju
konstrukcije objekta u Južnom bulevaru broj
10, Beograd
Južni izgradnja d.o.o.
3. Redovni pregled i Elaborat o stanju
prednapregnutog prstenastog sandučastog
nosača Hale 1 Beogradskog sajma
DP Beogradski sajam
4. Stručno mišljenje o mogućnosti obavljanja
vangabaritnog transporta na relaciji Kostolac
– Ripanj
Savatrans d.o.o.
5. Stručni nadzor nad izvođenjem specijalističkih
radova na sanaciji objekata aeratora i filtera na
postrojenju za prečišćavanje vode u Pančevu
JKP Vodovod i
kanalizacija,
Pančevo
6. Stručni nadzor na izgradnji mosta preko reka
Save i Kolubare na auto-putu E-763, deonica
Surčin – Obrenovac
JP Putevi Srbije
7. Izveštaj o pregledu mostova na auto-putu
E-763, deonica Obrenovac – Ub, od km 18
do km 40
China Shandong
International Economic
and Technical
Cooperation Group
Ltd.
Pregled naučnih i stručnih rezultata u 2017. godini 137
138 Institut za ispitivanje materijala a.d. Beograd
Laboratorija za ispitivanje konstrukcija
R.b. Referenca
1. Ispitivanje probnim opterećenjem železničkog mosta preko reke
Morače, statički raspon L = 2 x 39,5 m = 79,0 m, Crna Gora
2. Ispitivanje i monitoring konstrukcije kranske staze HE Đerdap 1 pri
postavljanju turbinskog agregata ukupne težine 850 t
3. Ispitivanje probnim opterećenjem na 20 konstrukcija drumskih
mostova u Republici Srbiji
4. Ispitivanje stenskih ankera probnim opterećenjem – Koridor X,
autoput E-75, deonica Niš – granica sa Republikom Makedonijom,
Tuneli Predejane i Manajle, investitor Euro Alliance Tunnels JSC
5. Ispitivanje stenskih ankera probnim opterećenjem
– Izgradnja brane vodozahvata Svračkovo
6. Ispitivanje probnim opterećenjem AB stubova niskonaponske mreže
do 45kW, Crna Gora
7. Ispitivanje mehaničkih svojstava panela za smanjenje saobraćajne
buke više tipova od profilisanog aluminijumskog lima sa ispunom od
kamene vune
8. Ispitivanje nosivosti i deformabilnosti prednapregnutih nadvratnih
greda 12 x 6,5 cm dužine 150 cm i 200 cm
9. Ispitivanje poklopaca i slivničkih rešetki u ramu više tipova
10. Ispitivanje nosivosti i deformabilnosti instalirane balkonske ograde od
laminiranog stakla na zgradi BW Kule A u Beogradu
11. Ispitivanje nosivosti i deformabilnosti stakla balkonske ograde na
zgradi Lamele E Poslovno stambenog kompleksa WEST 65 na Novom
Beogradu
Pregled naučnih i stručnih rezultata u 2017. godini 139
140 Institut za ispitivanje materijala a.d. Beograd
12. Ispitivanje nosivosti i deformabilnosti instalirane ograde od kaljenog
laminiranog stakla pričvršćenog za aluminijumski profil ograde
pomoću dvokomponentnog lepka na hotelsko poslovnom centru
Rajićeva
13. Ispitivanje nosivosti i deformabilnosti instalirane ograde od kaljenog
laminiranog stakla postavljenog u aluminijumski profil na objektu
Plaza u Višnjičkoj ulici
14. Ispitivanje nosivosti podnih ploča izrađenih od kaljenog laminiranog
četvoroslojnog stakla probnim opterećenjem
15. Ispitivanje krutosti prstena polietilenskih spiralno motanih cevi
ø1600 mm PR 9C-50/A 120
16. Ispitivanje nosivosti univerzalnih građevinskih podupirača
17. Ispitivanje nosivosti rama prostorne skele
Pregled naučnih i stručnih rezultata u 2017. godini 141
CERTIFICATION BODY SERTIFIKACIONO TELO
142 Institut za ispitivanje materijala a.d. Beograd
SERTIFIKACIONO TELO
Institut IMS je akreditovan kod Akreditacionog tela Srbije kao sertifikaciono
telo za obavljanje poslova sertifikacije građevinskih proizvoda prema standardu
SRPS ISO/IEC 17065:2016, Opšti zahtevi za tela koja sprovode sisteme
sertifikacije proizvoda, rešenje broj 04-003.
Na osnovu Rešenja Ministarstva građevinarstva, saobraćaja i infrastrukture,
Institut IMS ad je imenovan kao telo za sprovođenje ocenjivanja usaglašenosti
cementa opšte namene i cementa za specijalnu namenu u skladu sa zahtevima
Pravilnika o kvalitetu cementa (Sl. glasnik RS, br. 34/13 i 44/14) i čelika za
armiranje betona u skladu sa zahtevima Uredbe o tehničkim i drugim zahtevima
za čelik za armiranje betona (Sl. glasnik RS, br. 35/2015 i 44/2016).
Institut IMS ad je upisan u registar imenovanih tela za ocenjivanje usaglašenosti
pod jedinstvenim registarskim brojem И 030.
Institut IMS ad je i u toku 2017. godine nastavio saradnju sa češkim institutom
TZUS (www.tzus.cz) kroz zajedničko sprovođenje sertifikacije proizvoda
prema harmonizovanim evropskim standardima, kao i kroz održavanje obuka u
cilju pripreme osoblja Instituta IMS za predstojeće izmene regulative.
R.b. Referenca Investitor
Sertifikacija proizvoda prema harmonizovanim
evropskim standardima
1. ROCKWOOL ADRIATIC d.o.o. Potpićan, Hrvatska
2. URSA SLOVENIJA d.o.o. Novo Mesto, Slovenija
4. FIBRAN S.A. Thessaloniki, Greece
Sertifikacija proizvoda prema harmonizovanim
evropskim standardima u saradnji sa TZUS, Prag
5. SIKA d.o.o. Beograd, Srbija
6. LAFARGE BFC d.o.o. Beočin, Srbija
7. CRH (Srbija) d.o.o. Popovac, Srbija
Pregled naučnih i stručnih rezultata u 2017. godini 143
CONTROL BODY KONTROLNO TELO
144 Institut za ispitivanje materijala a.d. Beograd
KONTROLNO TELO INSTITUTA IMS
Krajem 2014. Kontrolno telo je dobilo sertifikat o akreditaciji ATS br. 06-170.
Akreditacija obuhvata oblasti kontrolisanja koje se sprovode u Centru za
metale i energetiku.
Kontrolisanje nove opreme pod pritiskom.
Ocenjivanje usaglašenosti nove opreme pod pritiskom primenom modula B, B1,
C1, F i G prema odredbama Pravilnika o tehničkim zahtevima za projektovanje,
izradu i ocenjivanje usaglašenosti opreme pod pritiskom (Sl.Glasnik RS
87/2011) i relevantnih harmon izovanih standarda.
Kontrolisanje proizvoda od gvožđa i čelika – pljosnati proizvodi, limovi, trake,
profili, cevi, šipke, žice, odlivci, otkovci, liveno gvožđe.
Kontrolisanje metalnih konstrukcija – čeličnih i aluminijumskih.
Kontrolisanje delova postrojenja i objekata pri izgradnji, rekonstrukciji,
revitalizaciji i remontu – procesnih, hidroenergetskih, hidromašinske opreme,
hidromehaničke opreme, termoenergetskih, turboenergetskih).
Kontrolisanje tehnologija zavarivanja metalnih materijala (elektrolučno
zavarivanje, gasno zavarivanje, navarivanje).
Pregled naučnih i stručnih rezultata u 2017. godini 145
146 Institut za ispitivanje materijala a.d. Beograd
R.b. Referenca
1. Prijemna kontrola opreme za HE Đerdap 1 - Kladovo u fabrikama:
SILOVIJE MAŠINE, St. Peterburg – Rusija;
BRUNO PRESEZZI , Milano, Burago di Molgora – Italija;
LITOSTROJ JEKLO, Ljubljana - Slovenija;
DSD Noell GmbH, Papenburg – Nemačka;
SILBITZ GUSS, Silbitz – Nemačka;
UCMR , Rešice – Rumunija;
GENERAL TURBO, Bukurešt – Rumunija;
PILSEN STEEL S.R.O., Plzen - Češka Republika;
GOŠA FOM – Smederevska Palanka;
MARKANT, Valjevo;
KOLUBARA METAL, Lazarevac;
PRVA PETOLETKA, Trstenik;
FOD, Bor.
2. Superkontrola delove mašinske opreme za površinske kopove:
PD TE i Kopovi Kostolac; PD Prim, Kostolac; RB Kolubara,
Lazarevac; TE Nikola Tesla, Obrenovac.
4. Kontrola kvaliteta čeličnih elemenata konstrukcije mosta preko reke
Save, metodama sa i bez razaranja za Ogranak Porr Technobau Und
Umwelt Aktiengesellschaft Beograd
5. Kontrola kvaliteta sastavnih delova betona ugrađenih u most preko
Save za Ogranak Slovenija Ceste – Tehnika Obnova Beograd
6. Kontrolisanje i ispitivanje mašinske opreme i radovi na gradilištu u
toku revitalizacije bloka 1 i izgradnji postrojenja za odsumporavanje
dimnih gasova blokova 1 I 2 u TE Kostolac B, PD TE KO Kostolac
7. Kontrola opreme i rezervnih delova na kotlovskom postrojenju u
kapitalnom remontu bloka B2, za period 2012-2015. god. za PD TE
KO Kostolac
Pregled naučnih i stručnih rezultata u 2017. godini 147
PT PROVIDER PT PROVAJDER
148 Institut za ispitivanje materijala a.d. Beograd
PIMS - PROVAJDER ZA ISPITIVANJE
OSPOSOBLJENOSTI INSTITUT IMS
Provajder za ispitivanje osposobljenosti Institut IMS je tokom 2017. godine
realizovao 11 šema ispitivanja osposobljenosti ispitnih laboratorija (ocenu
njihove kompetentnosti), sa predmetima ispitivanja prikazanih tabelom. Učešće
u realizaciji ovih šema uzelo je 94 laboratorije iz 28 zemalja Evrope, Azije i
Bliskog istoka.
Provajder Institut IMS je u postupku akreditacije kod Akreditacionog tela
Srbije, kao prvi provajder za ispitivanje osposobljenosti ispitnih laboratorija.
R.b. Predmet ispitivanja osposobljenosti Broj učesnika
1.
Cement
ciklus hemijskih svojstava
ciklus fizičko-mehaničkih svojstava
12 (5 iz Srbije)
23 (6 iz Srbije
i 3 sa Kosova)
2. Kameni agregat
ciklus fizičko-mehaničkih svojstava
24 (5 iz Srbije
i 3 sa Kosova)
3. Ploče iverice
ciklus fizičko-mehaničkih svojstava
6 (1 iz Srbije)
4. Bitumen
ciklus fizičkih svojstava
14 (3 iz Srbije
i 1 sa Kosova)
5. Buka u životnoj sredini
ciklus u zatvorenom prostoru
ciklus na otvorenom prostoru
7 (3 iz Srbije)
7 (4 iz Srbije)
6. Zvučna izolacija
ciklus izolacije od zvuka građevinskih
elemenata (terensko merenje)
6 (2 iz Srbije)
7. Elementi za zidanje od gline
ciklus mehaničkih svojstava
9 (1 iz Srbije
i 1 sa Kosova)
8. Požarna ispitivanja
ciklus ispitivanja negorivosti
12 (1 iz Srbije)
Pregled naučnih i stručnih rezultata u 2017. godini 149
9. Keramičke pločice
ciklus ciklus fizičko-mehaničkih svojstava
9 (1 iz Srbije)
Ukupno: 129 (32 iz Srbije
i 8 sa Kosova)
150 Institut za ispitivanje materijala a.d. Beograd