Abstract Thermal power stations generate large amount of coal bottom ash (CBA), which is mostly disposed of in landfills, creating environmental hazards. At the same time, the continual use of natural aggregate in concrete is depleting resources. Present study aims to address both these issues by utilizing coal bottom ash as partial substitute to river sand and quarry sand at values between 0% and 100%. Experimental results indicate that workability decreases with increasing CBA contain.
