RICE HUSK ASH-AN EXCELLENT CEMENT REDUCER
Keywords:Rice husk ash, compressive strength, workability, water absorption, Ordinary Portland cement (OPC)
In present era construction industries are one of the fastest growing industries in the world as a consequence of this demand of construction materials increasing day by day. For sustainable future pozzolanic materials produced from the waste materials can be used as partial replacement of cement for minimizing environmental risks and to improve the mechanical and durability properties of concrete. In this study efforts has been made to use rice husk ash (RHA) as partial replacement of cement because of its high pozzolanic behavior. RHA blended concrete is analyzed on three parameter i.e. compressive strength, workability and water absorption at different level of RHA replacement percentage i.e. 5%, 10%, 15%, 20%, 25%and 30%. It was observed in this study that 25% of RHA replacement in OPC cement is optimum limit without affecting the strength of concrete. It was also observed that the workability of concrete decreases with increase in RHA content. The percentage water absorption increases with increase in RHA content at the age of 28 days of curing but at the age of 90 days of curing the water absorption percentage is reduced.