2nd Evaluation
Transcript of 2nd Evaluation
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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