Eco-Friendly Concrete Roof Tiles Reinforced by Coconut Shell Powder and Coir

Coconut shell and coir were considered agricultural wastes and were used in open burning which harms the environment. The Philippines is ranked second among the top 5 coconut-producing countries in the world and produces approximately 14.7 million metric tons of coconut. To mitigate the growing problem of coconut wastes, an experiment to use coconut shell and coir as reinforcement in producing eco-friendly, light, and durable concrete roof tiles has been proven in this study. The optimal ratio among the trials made was 1 kilogram of cement, 0.75 kilograms of color cement, 0.10 kilograms coir, 2.25 kilograms of coconut shell powder, and 1 kilogram of sand. Furthermore, the feasibility of manufacturing and marketing this product has been proven with an initial investment of 60 million Philippine peso and a payback period of 2.83 years.