Strength and durability of concrete using Rice Husk ash as a partial replacement of cement

Abstract

Concrete is having most significant part in construction. The concrete mixture is made with the suitable ingredients like cement, fine aggregates, coarse aggregates and water. By using these materials, now a days the cost of the project is rising, to reduce the construction cost the natural materials are used to increase the strength values. In the current research the rice husk ash is used as a substitute for the cement in M20 grade concrete. The rice husk is the by product which is obtained from agriculture. The specimens are casted to determine the compressive, split tensile & flexural strength and durability of concrete. In this study the rice husk ash is used as a replacement of Ordinary Portland Cement (OPC) with 0%, 5%, 10%, 15%, 20% and 25% for workability, strength and durability values. From the experimental results it was noted that the highest values of compressive, split tensile and flexural strength for 7 days, 14 days and 28 days curing are obtained at 15% rice husk ash proportion & the percentage loss of strength and percentage loss of weight increases with increasing the rice husk ash content from 0% to 25% in M20 grade concrete.