Effect of pond ash on properties of C-25 concrete

Abstract

Nowadays, infrastructure construction is becoming a serious problem globally due to high material consumption. So, there are high demands in the construction industry using the river sand as fine aggregate in concrete production. Pond ash is an industrial waste product from the thermal power plant; such material can be used as a partial replacement of fine aggregate in C-25 grade of concrete. In this research work, each mix's workability was measured before the concrete cast, and the slum was 25 to 50 mm. Concrete cubes of size (150 mm × 150 mm × 150 mm) were prepared with seven different samples containing 0% (control) to 30% pond ash with increment of 5%. From the result obtained, the workability and density of concrete containing pond ash decreased with increase percentage content of pond ash in the mix. The compressive strength of pond ash concrete containing 5% and 10% have shown increment compared to the control concrete by about 0.13%,3.74%,2.46% and 0.04%, 1.14%,0.70% at 7, 14 and 28 days of curing respectively. Finally, in this study, the percentage replacement of fine aggregate concrete up to 10% by pond ash better resulted in compressive strength of concrete is found 34.75 N/mm2 at 28 days. Therefore, the optimum replaced fine aggregate by pond ash is 10%.