During the mixing process, cement was added to the mixture, which contains water, sand and coconut fibers. Water was added continuously until homogeneous slurry formed and also to avoid balling effect to the mixture. The wet mix was then transferred to the mold. After the molding process finished, sample was kept in the mold for a period of 24 hours (1 days). The sample was then de-molded after 24 hours and ready for curing. All samples were cured in the curing tank for a period of 28 days. Samples were taken out of the curing tank after 28 days for testing purpose.