Strength and Durability Studies on Lightweight Self-Compacting Concrete Partially Replacing Coarse Aggregate with Sintered Fly Ash Aggregate

Abstract

Abstract: This paper investigates the strength and durability studies on lightweight self-compacting concrete partially replacing coarse aggregate with sintered fly ash aggregate, with different grades of concrete. (M20, M30 and M40). In this study, the rational mix design procedure for self-compacting concrete is used. The present study consists of two phases. In the first phase, SCC mixes for different grades are developed without using lightweight aggregates. The second phase of the study introduces lightweight aggregates (i.e Sintered fly ash aggregates) varying in sizes from 8mm-12mm partially replacing coarse aggregate in self-compacting concrete. Compressive strength, split tensile strength and flexural strength and durability studies were conducted. The test results indicate significant improvement in the strength properties of self-compacting concrete by the inclusion of sintered fly ash aggregates as a partial replacement for natural aggregates.

Index Terms: Self-compacting concrete, Sintered fly ash aggregates, Lightweight Concrete, Lightweight self-compacting concrete, Durability.