The 28 days compressive strength test of concrete replaced with 0, 5 and 10% coconut shell ash as fine aggregate along with PPC and PSC was found to be 37.33, 28.00, 19.68, 26.37, 24.88 and 19.70 N/mm 2, respectively. As the replacement percentage kept on increasing, it was observed that the compressive strength of concrete decreased.