PARTIAL REPLACEMENT OF CEMENT WITH RICE HUSK ASH AND FINE AGGREGATES BY COCONUT SHELL POWDER IN CONCRETE

This research paper investigates the partial replacement of OPC cement with rice husk ash and fine aggregate with coconut shell ash in M25 grade concrete using 43-grade OPC cement. The aim is to study the effect of these replacements on the properties of concrete such as compressive strength. The mix design was carried out according to IS 10262:2019. In this study, the OPC cement was replaced with rice husk ash at 10% constant by the weight of the cement. The fine aggregate was replaced with coconut shell ash at levels of 4%,8%, and 12% by weight of fine aggregate. The results showed that the compressive strength of concrete increased with the increase in the replacement levels of both rice husk ash and coconut shell ash. The study also showed that the use of rice husk ash and coconut shell ash in concrete resulted in a reduction in the heat of hydration and improved workability. It was also found that the use of rice husk ash and coconut shell ash in concrete reduced the carbon footprint of the construction industry by utilizing waste materials that would otherwise be discarded. Overall, the findings of this study suggest that partial replacement of OPC cement with rice husk ash and fine aggregate with coconut shell ash is a viable and sustainable approach to concrete production. However, further studies are needed to investigate the long-term durability of concrete produced using these materials.