TECHNOLOGY News

DUCTILE MICROCONCRETES with High Fracture Energy and reaching fast or very fast Structural Performance

HPFRC - High Performance Fibre Reinforced Concretes

UHPFRCC - Ultra High Performance Fibre Reinforced Cementitious Composites

June 2013

High Performance Innovative Products

Securing

Structural reinforcements

Seismic retrofitting

Fire-resistant

Anti-corrosion

Innovative Products - Assistance “from Project to Jobsite”

Also following to the D.P.R. of June 6th 2012 and to the Guide Lines of June 19th 2012 after the earthquake in Emilia “Working Team Practicability of Seismic

Industrial Buildings” Tecnochem Italiana proposes:

REFOR-tec® specific System

For every Project requiring Structural Reinforcement and Seismic retrofitting:

- Low thickness jacketing (15-40 mm) without reinforcement, on reinforced concrete structures: PILLARS - FOUNDATIONS - BEAMS - NODES - WALLS

-Low thickness collaborating layer (15-40 mm) on floors in : CLAY-CEMENT,WOOD, BEAMS/BRICKS, STEEL PANELS, others.

-Combined system micro-concrete HPFRC/UHPFRCC with joints and connections 'ad hoc':

Deformation energy/ Fracture energy / Ductility /

Dissipation / Dynamic resistance

- Combined system of structural reinforcement

HPFRC/UHPFRCC (REFOR-tec®) and Composite materials /Carbon Fibre (VHDRS CarFib® also

protected with heat shields)

- Dynamic efficient 'DUCTILE' joints and connections

REFOR-tec® product range UHPFRCC (Ultra High Performance Fibre Reinforced

Cementitious Composites) represents an exceptional evolution in capacity and application fields

of (High Performance Fibre Reinforced Concretes). The products part of this product range unite a range of products with increased mechanical and compression resistances (100 to 280 MPa) and flexion (>25 to 80 MPa) with optimal ductility values (Fracture energy from 15.000 to 35.000 N/m) and other exceptional performance values.

REFOR-tec® systems : more than 18 years of R&D, Innovation,

Experimentation, Project development, Applications

Performance evidence of REFOR-tec®

as COLLABORATING LAYER ON FLOORS

1° International price in the category “Special Projects”

Award of Excellence U.S.A., November 2012 :

see Newsletter REFOR-tec® FLOORS on the page “NEWS” on our website www.tecnochem.it

In case of using REFOR-tec® GF5 ST-HS as collaborating layer: the balance of the tensile forces in the two directions is guaranteed due to the tensile strength of the material.

mkNmmm

kNF Rt /),(

,750150015000

2=⋅⋅=

mkNmmm

kNF Rt /),(

,150030015000

2=⋅⋅=

mkNmmm

kNF Rt /),(

,250050015000

2=⋅⋅=

� increase >200% of Mrd - Moment resistant design final !!!

(REFOR-tec® thickness 15 mm)

(REFOR-tec® thickness 30 mm)

(REFOR-tec® thickness 50 mm)

Evidence of performance with HINGE TEST Of Structural reinforcement and seismic retrofitting

Of jacketing with REFOR-tec® on PILARS/NODES

Evidence of performance of jacketing with

REFOR-tec® ON BEAMS

See Presentations at Seminars: fib Symposium Prague June 2011 and ACI/Canmet Conference Prague Oct. 2012

see Presentations on the “NEWSLETTER” page of our website www.tecnochem.it Possible doubling of the ultimate load of beams under bending by applying 40 mm Refor-tec®. Increased stiffness with reduction of the arrow up to 12 times (comparable to a pre-compression).

Publication in the U.S.A. I.C.R.I magazine– International Concrete Repair Institute – o the Project

Development, Testing and Application of the

Structural reinforcement and Seismic Retrofitting of the Zagarolo (Rome) school

building. The testing, which has been

performed by the University of Bergamo

(Italy), has resulted in the approval by the Superior Board of Public Works.

see Article “High-Performance Fibre-Reinforced Concrete Jacketing in a Seismic Retrofitting Application” on the “NEWS” page on our website www.tecnochem.it

Prequalification made with the University of Liège

Of the FIRE RESISTANCE (800÷÷÷÷1000°C in the oven) on

BEAMS IN R.C. - L = 5 meter , 25 MPa ,

with jacketing REFOR-tec®, thickness 40 mm,

under constant load of 300 KN

for 130 minutes without beam failure

and a perfect behaviour of the jacket REFOR-tec®

� Maximum fire-resistance : Certificate by Liège University EF/FH/1231

Temperature of the oven: 800°C after 20 minutes; 1000°C after 80 minutes

Maximum deflection 75 mm after 130 minutes.

Partial elasticreturn after unloading to 42 mm

Without spalling

Without delamination

Distributed micro-cracks

Perfect behaviour on adhesion of the REFOR-tec® jacket to the concrete

Perfect integrity of the REFOR-tec® jacket

300 KN constant load on the beam

Performance evidence of

REFOR-tec® jacket Compared to

FRP – Carbon fibre On PILLARS in R.C.

pillar as such

pillar reinforced with FRP textile in carbon fibre pillar reinforced with REFOR-tec® jacket

As a result of experimental tests, it is well known that the structural reinforcement

with Carbon Fibre Fabrics for wrapping of columns allows a limited increase in the

values of Axial Load and Resistance Moment of max. +15%.

Compared to the considerable increase with a jacket of REFOR-tec® :

with 3 cm thickness +238% Axial Load, +256% Resistance Moment

with 4 cm thickness +331% Axial Load, +362% Resistance Moment

State of facts :

Beam 30x30 cm

Concrete c 20/25

Steel 3+3 diam 16 FeB 44k

_______ Beam as such

________ BEAM REINFORCED WITH

FRP – CARBON FIBRE FABRIC -

MODULUS OF ELASTICITY 240 GPa -

Weight 400 g/m2

________ BEAM REINFORCED WITH

MICRO-CONCRETE UHPFRCC - REFOR-

TEC®

– JACKETING THICKNESS 3 cm, NO

REINFORCEMENT

Axial load Moment of Resistance

Beam 1300 KN 80 KNm

+ FRP 1500 KN 90 KNm

+ REFOR-tec® 4400 KN 285 KNm

State of facts :

Beam 30x30 cm

Concrete c 20/25

Steel 3+3 diam 16 FeB 44k

_______ Beam as such

________ BEAM REINFORCED WITH

FRP – CARBON FIBRE FABRIC -

MODULUS OF ELASTICITY 240 GPa -

Weight 400 g/m2

________ BEAM REINFORCED WITH

MICRO-CONCRETE UHPFRCC - REFOR-

TEC®

– JACKETING THICKNESS 4 cm, NO

REINFORCEMENT

Axial Load Moment of Resistance

Beam 1300 KN 80 KNm

+ FRP 1500 KN 90 KNm

+ REFOR-tec® 5600 KN 370 KNm

Compared performance tests

REFOR-tec® / FRP

Of the same DOMAIN M-N

Transferred on Histogram

PILLAR in R.C.

→ PILLAR*

→ pillar * + FRP (240 GPa, 300-400 g/m2)

→ pillar * + REFOR-tec® GF5 / ST-HS thickness 3 cm (un-reinforced jacketing )

→ pillar * + REFOR-tec® GF5 / ST-HS thickness 4 cm (un-reinforced jacketing)

Note*: C 20/25 reinforced 3+3 ø16FeB 44 K

AX

IAL

LO

AD

RE

RS

IST

AN

CE

MO

ME

NT

Comparison of the architectural and performance impact of:

Pillar in R.C.

Pillar reinforced with steel jacket

Pillar reinforced with jacket with R.C. concrete

Pillar reinforced with REFOR-tec® 40 mm jacket Courtesy of Eng. Oreste Mammana- Consultant for the Design of Structural Works of Seismic

Improvement of the Castel di Sangro Hospital (L’Aquila)

-------------------------------------------------------------------------------------------------------------------------

Extract from the thesis: ”The use of fiber-reinforced concretes for the seismic retrofitting of existing buioldings” - Supervisor Prof. Eng. Raffaele Landolfo – Teachers co-: Arch. Ornella Iuorio; Eng. Oreste

Mammana - Candidate Arch. Silvia Costanzo - University of Naples Federico II

PERFORMANCE COMPARISON

Interaction domain N-M for various types of reinforcement - nominal values according property of the materials

M (KNm)

N (KN)

ARCHITECTURAL IMPACT

Jacket inC.A.

Jacket in steel

Jacket in REFOR-tec®

• Significant increase in the geometry

• Necessary to plaster

• Light increase in the geometry

• Necessary to apply fire protection

• Necessary to plaster

• No increase in the geometry of the element

• Only need for finishing layer (paint)

• Texture

Axial load Resistance Moment

Pillar

2000 KN

170 KNm

With steel jacket; extra thickness 10 mm

3000 KN

350 KNm

With jacket in R.C., extra thickness 65 mm

7000 KN

700 KNm

with REFOR-tec® jacket; thickness 40 mm, no extra thickness(thickness equal to what is removed by scarification)

10.300 KN

870 KNm

Performance evidence of

Jacket with REFOR-tec® not reinforced Compared to

Jacket in R.C. of 80 MPa

Certificate from the Milan Politecnico "Cyclic tests of bending beam specimens in reinforced concrete pillar

Comparison of two different structural reinforcement systems through experimental tests "

Performance comparison after test “hinge” with axial load 60 KN :

DISPLACEMENT 8 mm 16 mm 32 mm 48 mm 64 mm

DRIFT 0,5% 1% 2% 3% 4%

Performance comparison between PILLAR Nr.1 and PILLAR Nr.2

-200

-150

-100

-50

0

50

100

150

200

250

-80 -60 -40 -20 0 20 40 60 80

incamiciatura armata 12FI14

REFORTEC

PILLAR Nr. 1 Jacketing 40 mm non reinforced with REFOR-tec® GF5 /ST-HS

PILLAR Nr. 2 Jacketing 50 mm reinforced With grout 80 MPa

On the pillar no. 1 the

program has been completed with all

the displacement

involved: 8-16-32-48-

64 mm. Pillar

perfectly intact, it

maintains its structural capacity*,

only some micro-crack.

The pillar no. 2 shows the beginning of spalling of the concrete already with displacement of 16 mm

and with 1% of drift. With 32 mm displacement and

2% of drift, with probable load of 170 KN, the

concrete shows widespread cracking, crushing and

spalling, tensile failure of some bars with loss of its structural capabilities*.

Note*: 93% resistance remains in respect to the original maximal resistance.

Note * : 53 of the resistance finally remains in respect to the maximal original resistance.

Disintegrated beam Integral beam alter the hinge test, with displacement up to 64 mm.

Since the Regulation 3274 dated May 2003, Tecnochem Italiana Promotes, Assists and Applies REFOR-tec® systems for the Structural Reinforcement and

Seismic Retrofitting of structures in R.C.

Post-earthquake in Emilia shows the great pre-seismic solutions in evidence

with REFOR-tec® ductile systems and Combined systems REFOR-tec® and Steel

for Iso-Static Solutions for Industrial Buildings

Pre-seismic REFOR-tec® solutions for the

Seismic retrofitting of Isostatic Structures of

industrial constructions

Collapsed structure after seismic event

0,10-0,15 g SEISMIC CLASS 3

Tecnochem Italiana promotes, assists in projects

and applies the Ductile System REFOR - tec®

since

before the Ordinance 3274-Gazzetta Ufficiale n.

72, 8 May 2003 and subsequent publications in

our Periodic Technical – Scientific Paper

TECNOlogica n°5 May 2005 entitled: “Seismicity in

the Territory Italy – Standards and Projected

Evolutions – Can ductility be designed?” ….and

following to the Decree of June 6, 2012 and the

Guidelines of June 19, 2012.

After Emilia Earthquake.

18 years of R&D - Hundreds of Projects and Applications realised: Structural Reinforcement – Seismic retrofitting - Engineering

BEAM jacket PILLAR jacket Jacket PILLAR-FOUNDATION

Collaborating layer on FLOORS Connections and joints Jacket WALL-FLOOR

Experimentation with dynamic loads as seismic simulations

- PILLAR-FOUNDATION

Experimentation with dynamic loads as seismic simulations - NODES BEAMS-PILLARS

SHAPE ENGINEERING

Request for information or project assistance :

U.A.P.P. – TECNOCHEM Engineering Office - e-mail : uapp@tecnochem.it

TECNOCHEM ITALIANA SPA - Via Sorte 2/4 - 24030 Barzana (BG) www.tecnochem.it - uapp@tecnochem.it

Pls consult our web-site www.tecnochem.it