Experimental Study on the Durability of Concrete with Partial Replacement of Sand with Fly Ash

Abstract

To fulfil the massive demand for concrete in construction, the need for natural aggregates is growing day by day, negatively impacting the environment. The river ecosystem is harmed by sand collected from the river bed. Fly ash, on the other hand, is a substantial solid waste created during the combustion of coal in thermal power plants. Despite the multiple applications of fly ash in cement making, brick production, and land filling, some percentages stay unused, requiring vast amounts of land while creating environmental pollution. These two issues can be mitigated if fly ash can be used for partially replacing sand in concrete. In this paper, laboratory trials were conducted to replace 0, 20, and 40% of fine aggregate in concrete. Later carbonation test was conducted on the samples to understand their effects on real life conditions.