AN EXPERIMENTAL STUDY ON PARTIAL REPLACEMENT OF CEMENT WITH METAKAOLIN

Abstract

Environmental pollution caused by the extraction of raw materials and CO2 emissions in the production of cement leads to the pressures to reduce the consumption of this constituent of concrete. At the same time requirement of cement should be fulfilled and also need to increase its durability. The cement highly energy intensive and costly component of concrete thus the unit cost of concrete can be reduced by percentage replacement of cement with other waste pozzolanic materials. Some materials are also used to enhance strength and durability properties of concrete materials such as metakaolin and another byproduct like flyash. Metakaolin is the anhydrous calcined form of the clay mineral kaolinite. Past investigation shows that partial replacement of cement with metakaolin increases the strength of the concrete, durability and gives a fine finish. In this present study, mechanical properties of metakaolin and
compressive of the concrete with partial replacement of cement 5%, 10% and 15% with metakaolin are investigated. Various tests on metakaolin are performed and mix design works out. Results show that the specific gravity of metakaolin is 2.73. The compressive strength of MK5 for 28 days was higher by 24% respectively than the control mix M20. The compressive strength of MK10 and MK15 for 28 days was higher by 24%, 44%, and 29% respectively than the control mix M20 and the optimum percentage replacement of MK is found to be 10%. . As Metakaolin has pozzolanic properties, so it shows positive effect in resulting properties of concrete.