STUDY ON PARTIAL REPLACEMENT OF CEMENT WITH RHA AND METAKAOLIN.

Concrete is the most widely used construction material in civil engineering because of its high structural strength and stability. Ternary blended concrete is developed by partial replacement of cement with metakaolin and rice husk ash in high performance concrete mix design. Rice husk ash is a by-product material obtained from the controlled combustion of rice husk which consists of non crystalline silicon dioxide with high specific surface area and high pozzolanic reactivityRice husk ash which reduces the emission of carbon and produces green effect in environment. Metakaolin helps to reduce the amount of calcium hydroxide, thus resulting in stronger and durable concrete. In this research the experimental investigations carried out in three phase M30 mix grade concrete is used with RHA in proportions of 0%,5%,10%,15% and 20% .In second phase metakalon in various proportions of 2.5%and 5% and in third combination of metakaolin and RHA were tested. From this research the results are much better as compare to conventional concrete.