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Effect Of Sand Content On
Strength Of High StrengthConcrete
Presented by
Rashmiranjan Sahoo
Under the guidance of Ananda Kumar Jena
Dr. P.K Pani Rajesh Kumar Nayak
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OBJECTIVE OF THE PROJECT
This project deals with the analysis of properties ofhigh
strength concrete mix with compressive strengthof MPa and to study
the influence of the percentageof sand on the 28 days compressive
strength of 150*150mm concrete cube.
High performance concrete is usually producedusing high quality
materials.Due to versatility ofconcrete it can be possible to get
concrete of variousstrengths by slightly varying the quality and
quantityof its ingredients. This project work intends to
investigate the optimum percentage of sand to beused in M50
concrete mix design to obtain themaximum strength.
To see the variation strength with sand contentvariation.
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INTRODUCTION
Concrete is the second largest material consumed byhuman beings
after food and water as per WHO. It isobtained by mixing cement,
fine aggregate, coarseaggregate and water in required
proportions.
The high strength concrete mix needs some specialattention. To
achieve high strength, it is necessary touse lowest possible
water-cement ratio which
invariably affects the workability of the mix andnecessitates
the use of special vibration techniquesand plasticizing materials
for proper compaction.
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WHAT IS HIGH STRENGTH
CONCRETE?
It is a type high performance concrete generally with aspecified
compressive strength of 40 Mpa or greater. Itrequires high quality
control and good quality ofaggregates.
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WHY do we need high strength
concrete? To put the concrete into service at much earlier age
for
example opening the pavement.
To build high rise buildings by reducing column sizes
and increasing available space. To build the superstructure of
long span bridges and
to enhance the durability of bridge decks.
To satisfy the specific needs of special application such
as durability modulus of elasticity and f lexuralstrength some
of these application includes dams,grand stand roofs, marine
foundations, parkinggarages and heavy duty industrial floors
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Guidelines for the selection of
materials
smaller maximum size of coarse aggregate.
Using supplementary cementitious materials, such asblast-furnace
slag, fly ash and natural pozzolans.
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Factors to be considered in Mix
design (as per SP23-1982)
Grade of concrete
Type of cement
Maximum nominal size of aggregate
Minimum water cement ratio
Workability
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Test results
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