Use of silica fume as a replacement of cement in the concrete

Abstract

Over the past 30 years, significant advancements have been made in enhancing the capabilities of concrete as a construction material, with a focus on high-strength concrete applications using Silica Fume (SF). Global interest in SF as a pozzolanic admixture has surged owing to its ability to enhance concrete properties when used at specific percentages. This study examined the effect of addition of SF in concrete mixes. The performance of concrete in corrosive environment is most important and it can be enhanced by the addition of SF. For strength and longevity, hight strength concrete is required. In this study, concrete was prepared with varying proportions of silica fume (5, 10, and 15% by aggregate volume). The specimens were tested to evaluate their strength. The cubes and beams were casted, cured and tested on universal testing machine. The findings showed that both the compressive and flexural strengths were improved by the addition of silica fume. The mechanical and durability properties of concrete are significantly enhanced by the incorporation of silica fume. The findings of this study are helpful for construction industry in the use of silica fume as an economical choice for the enhancement of strength.