Partial Replacement of Metakaolin on High Strength Concrete

Abstract

Cost effective construction can be achieved by replacing cement, the major constituent of concrete with a suitable material generally some supplementary cementitious material like metakaolin. In order to satisfy the increased demand for high rise structures as well as highway bridges to name a few, high strength concrete mix is preferred over conventional concrete. The addition of metakaolin in high strength concrete can bring about vast changes in terms of economy as well as efficiency of construction. This study aims to determine the optimum quantity of metakaolin required for production of concrete of higher efficiency in terms of strength. The concrete mix used is of M₆₀ grade and cement fraction was partially replaced with 10, 12.5, 15, 17.5 and 20%metakaolin by mass. Compression strength, split tensile strength and flexural strength tests were carried outon specimens and results indicate optimum metakaolin content as 15%