Experimental Investigation on Strength and Workability Properties of Concrete with Partial Replacement of Cement by Metakaolin and Rice Husk Ash

Abstract

Concrete is the most extensively used construction material around the world and its properties have been undergoing changes through technological advancements. Varieties of concrete have been developed to enhance the different properties of concrete. An investigation into the potential use of partial replacement of mineral admixture in high-strength concrete has been carried out. The engineering properties of fresh and hardened concrete are obtained by conducting tests on the slump, and compressive strength at 3,7 and 28 days of the curing period, in this research partial replacement of cement by metakaolin and rice husk ash been used for varying replacement of 0%,5%,10%,15%, and 20% with MK(Metakaolin) and 0%,5%,10%(constant) with Rice husk ash (RHA) for high strength, workability and also an eco-friendly by less emission of CO₂. The compressive strength of concrete made with MK-RHA has been compared with High-strength concrete i.e; M60 grade of concrete. It has been concluded that the strength development of concrete blended with metakaolin and rice hush ash was enhanced. It was found that a 10% replacement of metakaolin and a 10% replacement of rice husk ash appeared to be the optimum replacement which exhibited more strength. This investigation has proved that the 10%MK and 10%RHA concrete can be used as structural concrete at a suitable replacement.