Performance Characterization of Concrete Using Metakaolin as Supplementary Cementing Material

Abstract

This research presents the mechanical, durability and micro structural properties of concrete using metakaolin by partial replacement of cement. In this context, metakaolin replaced at 10%, 20% and 30% by weight of cement water cement ratio 0.47. For this purpose, mix design was prepared according to IS 10262: 2019 for M25 and OPC 43 grade of concrete. Various mixes of cubes and cylinders were prepared to check the compressibility and split tensile strength after 7 and 28 days of curing. To determine the durability properties of concrete, water absorption test was also performed after 28 days. Once the tests were performed, samples from broken pieces of cubes are taken for micro structural analysis. This was analyzed by Scanning Electron Microscope (SEM). It was observed that 20% of metakaolin was considered to be suitable as replacement of cement. The compressive strength and tensile strength at 7 and 28 days found to be higher as compared to other percentages.