high perfomance concrete
TRANSCRIPT
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Proposed Area of Research
High Performance ConcreteBy
Karthik .R Research Scholar
Under The Guidance of
Dr. J. Karthikeyan Assistant Professor
Department of Civil Engineering
National Institute of Technology
Tiruchirappalli - 620 015
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HIGH PERFOMANCE
CONCRETE
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Contents
Introduction Aim
Preliminary Investigation
Mix Design Mechanical Properties
Microstructure Study
Durability Analysis
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Introduction
High Performance Concrete
High performance concrete (HPC) has been defined asconcrete that possesses high strength, good workability,and high durability.
ACI has defined HPC as a concrete in which certaincharacteristics are developed for a particular applicationand environment. Under the ACI definition durability isoptional and this has led to a number of HPC structures,which should theoretically have had very long services
lives, exhibiting durability associated distress early in their lives. ACI also defines a high-strength concrete asconcrete that has a specified compressive strength for design of 41 Mpa (6,000 psi) or greater.
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Environmentalconsiderations
Construction
Processes
Materialsand MixDesign
Loadconsiderat
ions
Structuralconsiderations
HighPerformance
Concrete
Cont…
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Cont…
Principle
Very low w / binder Value together with a dense fine grainmatrix and with “super liquefier”
Basic structure
Optimal compositionof filling spheres
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Cont… (Materials)
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Preliminary Investigation
Determination of optimum proportions of mineral
admixtures for the blended cement.Fineness for the blended cement.
Setting time.
Soundness .
Specific gravity.
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Mix Design
Mix Design based on Meth and Aitcin Simplified
Method.Strength ranging 100 Mpa
Selection of binder 100 % of Portland cement to be used.
Mix containing 100 % PPC is considered as a controlmix, were this PPC is replaced by blended cementhaving optimum proportions of mineral admixtures
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Microstructure Study
Microstructure properties for the specimens at an
age of 3, 7 and 28th day to be determined.
Were SEM and XRD techniques are to be used for this analysis to determine particle size, chemical
composition and etc,.
Hydration processes of the Blended Cement Pastebased on the Microstructure analysis is to becarried out.
Based on the results a detailed discussions andcomparisons are to be made.
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Work in Progress
Normal Consistency Test
Mix 1 – FA-0 SF-0 MK-0Mix 2 – FA-30 SF-0 MK-0
Mix 3 – FA-30 SF-10 MK-0
Mix 4 – FA-20 SF-7.5 MK-2.5
Mix 5 – FA-20 SF-5.0 MK-5.0
Mix 6 – FA-20 SF-2.5 MK-7.5
Mix 7 – FA-20 SF-0 MK-10
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Work in Progress
Setting Time Test
Mix 1 – FA-0 SF-0 MK-0Mix 2 – FA-30 SF-0 MK-0
Mix 3 – FA-30 SF-10 MK-0
Mix 4 – FA-20 SF-7.5 MK-2.5
Mix 5 – FA-20 SF-5.0 MK-5.0
Mix 6 – FA-20 SF-2.5 MK-7.5
Mix 7 – FA-20 SF-0 MK-10
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Work Plan