SUITABILITY OF CALCINED CLAY AS PARTIAL REPLACEMENT OF CEMENT IN CONCRETE PRODUCTION

Abstract

Concrete is an extensively used construction material in the world. However, environmental concerns both in terms of damage caused by the extraction of raw materials and CO2 emission during cement manufacture have brought pressure to reduce cement consumption by the use of supplementary materials. The utilization of calcined clay in concrete. In this research, a study was conducted to look into the performance of calcined clay as cement replacement material in concrete. The study focuses on chemical characterization of raw and calcined clay, physical properties of calcined clay blended with ordinary Portland cement and compressive strength of calcined clay blended cement at various percentage replacement (0,5,10,20,30 and 40%). Strength properties of the moulded cubes at different pertage replacement were evaluated at 7,14,21 and 28^th curing days. Compressive strength at 5% replacement were higher than the control strength, and the strength began to reduce as the replacement percentage was increasing.