High Early Strengths In Concrete with Fly Ash and Metakaolin

Abstract

The present study investigates different replacement percentages of metakaolin (MK) in ternary blends of ordinary portland cement (OPC), fly ash (FA) and MK for achieving high early strengths in cement concrete. OPC is replaced by 10%, 13% and 16 % MK while 15% FA is uniformly used in all the mixtures. The tests for compressive strength, splitting tensile strength and flexural strength at 7 days and 28 days periods reveal that 7 days strengths at par with the control concrete can be achieved in OPC-FA mix by MK addition. The mix with 10% MK gives highest 7 days compressive strength.