Limited Substitution of OPC by S.F. With High Strength Concrete Grades

Abstract

The aim of this study is to evaluate the performance effects on concrete by mineral admixture such as silica fume (as a partial replacement of cement) in concrete when it is mixed in cement concrete for workability, durability and strength of concrete using Ordinary Portland Cement(OPC-43 grade). Silica fume is a supplementary cementitious material that can be utilized to produce highly durable concrete composites. In this study, Silica fume has been used to replace Ordinary Portland Cement (OPC) which varies from 2.5% to 10% at interval of 2.5% by total weight of Ordinary Portland Cement (OPC).A total ten mixes (trial mix, control mix and variation mix) were prepared for M55 & M60 grade of concrete. This study investigates the performance of concrete under influence of silica fume in terms of slump, compressive strength at 7 days and 28 days, flexural strength of beam at 28 days and splitting tensile strength of Cylinder at 28 days. Total number of specimens for cubes, cylinders and beams were 50, 30 and 30 respectively, which were casted for testing to study the influence of Silica fume on concrete.