Coal Bottom Ash as A Partial Replacement with Fine Aggregate in Concrete

This study examines the use of coal bottom ash as a fine aggregate replacement in concrete to make use of thermal power plant waste. The primary source of coal ash generation is from coal-fired thermal power facilities. Coal bottom ash (CBA) is the coal ash that has accumulated at the furnace’s bottom. Exploring the potential for using coal bottom ash as a partial replacement for fine aggregate in concrete was the goal of the current research project. The characteristics of freshly-poured and hardened concrete that contains coal bottom ash were evaluated through experimental experiments. Bottom ash was substituted for fine aggregate in experiments to varied degrees (20%, 40%, and 60%, respectively). The findings demonstrated that a higher bottom ash content results in a decrease in workability and plastic density and an increase in bleeding. Compressive strength also dramatically declined above 40% replacement of bottom ash. According to the research’s test results, using coal bottom ash as a substitute for fine aggregate in concrete decreased workability and water loss from bleeding at a set water-to-cement ratio. Concrete made from bottom ash and curing for 7 and 28 days. Thus, for that particular percentage replacement, concrete can employ bottom ash from the thermal power plant in place of fine aggregate.