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EXPERIMENTAL INVESTIGATIONS ON STRENGTH

PROPERTIES OF TERNARY BLENDED CONCRETE

A DISSERTATION ONPARTIAL FULFILLMENT OF MASTER OF TECHNOLOGY

BY

A.BHASKARRoll No.11016T6013,M.Tech IV Semester

Under The Guidence Of

Shri D.Hari Krishna Asso.Prof.CED, KITS, Warangal

DEPARTMENT OF CIVIL ENGINEERING

KAKATIYA INSTITUTE OF TECHNOLOGY AND SCIENCE, WARANGAL - 15.


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CONTENTS

INTRODUCTION

LITERATURE

OBJECTIVES

METHODOLOGY

SCOPE

REFERENCES


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INTRODUCTION

Ternary blend

The particle packing is the main reason. The fly ash particle is often finerthan the cement. The silica fume particles can perform better in particle

packing since these are intermediate size.

Blended concrete is one of the most significant new material available

worldwide for new construction and for rehabilitation purposes.Economics (lower cement requirement) and environmental

considerations also have a role in the growth of mineral admixture

usage.

Studies have shown that pozzolanic materials such as blast furnaceslag, fly ash and silica fume enhance the strength and durability of

concrete


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Effect of ternary cement system

Micro silica compensates for low early strength of concrete.

Fly ash increases long-term strength development of micro silica concre

Fly ash due to presence of spherical leads to improved workability and

reduction in water demand


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LITERATURE REVIEW

Effect of supplementary cementitious materials on the compressive

strength and durability of short-term cured concreteFrom PERGAMON,

SCIENCEDIRECT.COMH. Toutanjia,*, N. Delattec, S. Aggounb, R. Duvalb, A. Dansona

Received 22 August 2002; accepted 11 August 2003.

This research focuses on studying the effect different supplementary cementitious

materials (silica fume, fly ash, slag, and their combinations) on strength and

durability of concrete cured for a short period of time14 days. This work

primarily deals with the characteristics of these materials, including strength,

durability, and resistance to wet and dry and freeze and thaw environments. Over

16 mixes were made and compared to the control mix. Each of these mixes was

either differing in the percentages of the additives or was combinations of two or

more additives. All specimens were moist cured for 14 days before testing or

subjected to environmental exposure. The freezethaw and wetdry specimens

were also compared to the control mix


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Use of ternary cementitious systems containing silica fume and

fly ash in concrete From PERGAMON, SCIENCEDIRECT.COM

M.D.A. Thomasa,*, M.H. Shehataa, S.G. Shashiprakasha, D.S. Hopkinsb, K. CailbReceived 25 August 1998; accepted 19 April 1999

This paper reports the results from laboratory studies on the durability of concrete

that contains ternary blends of portland cement, silica fume, and a wide range of fly

ashes. combinations of relatively small levels of silica fume (e.g., 3 to 6%) and

moderate levels of high CaO fly ash (20 to 30%) were very effective in reducing

expansion due to ASR and also produced a high level of sulphate resistance.Concretes made with these proportions generally show excellent fresh and

hardened properties since the combination of silica fume and fly ash is somewhat

synergistic


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METHODOLOGY

PHASE - 1

Procurement of Materials

Cementatious material:Ordinary Portland cement 53 grade is used in this study. The chemical and physical

characteristics of two mineral admixtures silica fume and fly ash are also given in Table.

2 Fine AggregateThe locally available sand is used as fine aggregate in the present investigation. The

sand is free from clayey matter, salt and organic impurities. The sand is tested for

various properties like specific gravity, bulk density etc., and in accordance with IS

2386-1963

3.Coarse AggregateMachine crushed angular granite metal of 20mm nominal size from the local source is

used as coarse aggregate. It is free from impurities such as dust, clay particles and

organic matter etc. The physical properties of coarse aggregate were investigated in

accordance with IS 2386 -1963


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S.No. Property Test Method Test Result1 Specific Gravity Specific gravity bottle

(IS 4031-Part 11) 3.15

2 Initial Setting time Vicat apparatus(IS 4031-Part 5) 40 min

3 Normal Consistency Vicat apparatus(IS 4031-Part 4) 32 %

4 Fineness Sieve test on sieve no.9(IS 4031-part 11) 7%

Properties of Ordinary Portland Cement

WATER

Locally available water used for mixing and curing which is potable and is

free from injurious amounts of oils, acids, alkalis, salts, sugar, organic

materials or other substances that may be deleterious to concrete or steel.


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S.No. Property Test Method Test

Results

1 Fineness modulus Sieve analysis(IS 2386-1963 Part 2)

2.49

2 Specific gravityPycnometer

(IS 2386-1963 Part 3)2.60

3Bulk density (kg/m3) - Loose

Bulk density (kg/m3) - Dense(IS 2386-1963 Part 3)

1500

1633

Properties of Fine Aggregate & Coarse Aggregate

S.No. Property Test Method Value1 Fineness modulus Sieve analysis

(IS 2386-1963 Part 2)7.7

2Specific gravity Pycnometer

(IS 2386-1963 Part 3)2.59

3 Bulk density (kg/m3) - LooseBulk density (kg/m3) - Dense (IS 2386-1963 Part 3)

13661513


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Concrete Mix Design

Using the properties of cement aggregate concrete mix of M30

grade was designed as per IS

10262-198the following proportions by weight were obtained.

Cement sand coarse aggregate1 1.26 2.34

Water cement ratio = 0.40

The same proportion of mix was used throughout the experimental programme .


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Tensile strength is one of the basic and

important properties of the concrete. The

concrete is not usually expected to resist the

direct tension because of its low tensile

strength and

brittle nature. However, the determination oftensile strength of concrete is necessary to

determine the load at which the concrete

members may crack. The cracking is a form

of tension

failure.


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OBJECTIVES


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SCOPE OF PRESENT INVESTIGATION

The present experiment is carried out to investigate the strength of

ternary blended reinforced concrete on M30 grade concrete with

6% and 15% replacement of cement by silica fume and fly ash

respectively


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Mehta, P K Concrete Structures, Properties and Materials Prentice Hall,

Inc, Englewood Cliffs, New Jersey,

M S Shetty,Concrete Technology, Published May 1st 1987 by Chand (S.) &

Co Ltd, 632 pages, Hardcover.

M L Gambhir, Concrete Technology, Published by Tata McGraw-Hill

Education, 01-Jul-2004

Adam M Neville, Properties ofConcreteBookby John Wiley & Sons

Publisher

References

CEMENT CONCRETE & AGGREGATES Australia JULY 2OO2 journal


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THANKYOU

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