A Study on Fresh and Hardened Properties of M25 & M45 grade Concrete, Partially Replacing Cement with Fly Ash,Metakaolin & Fully replacing Natural sand With Robsand
Author(s):
Bommireddy Mohitha, K.Pravallika
Keywords:
Fly ash, Metakaolin, compressive strength, split tensile and flexural strength.
Abstract
Concrete is the most extensively used construction material in the world, which consumes natural resources like lime, aggregates and water. The worldwide production of cement has greatly increased, due to this production environmental pollution increases with emission of CO2 gas. To reduce this effect cement was replaced by some supplementary materials like Metakaolin, Fly ash, Bottom Ash, Ground Granulated Blast Furnace Slag (GGBS) and Rice Husk etc. In this content Metakaolin and fly ash Pozzolanic material used in wide range in replacement of cement. Metakaolin is dehydroxylated aluminum silicate, Fly ash due to its Pozzolanic activity the strength properties and durability properties of concrete increases and reduction in Porosity and Permeability also. Now-a-day’s availability of natural sand is constraint, so alternative material called ROBO Sand (having similar properties as that Natural Sand) is used in place of Natural sand to study the fresh hardened properties of concrete. In this present investigation cement is replaced partially with Metakaolin and Fly ash in varying percentage i.e., 0%, 5%, 10%, 15% and 20% and natural sand with 100% ROBO sand to get the different concrete mixes. The fresh and mechanical properties of concrete i.e., workability (slump test) and compressive strength, split tensile strength and flexural strength at 7 days, 14 days, 28 days and 90 days are studied of the different concrete mixes and results are compared with conventional concrete.
Article Details
Unique Paper ID: 156893

Publication Volume & Issue: Volume 9, Issue 5

Page(s): 288 - 293
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