Development of high strength high performance concrete using Indian metakaolin

Abstract

A study had been undertaken to study the effect of incorporating local metakaolin (MK) on the properties of high strength concrete designed for a constant water/binder ratio of 0.3. Metakaolin (MK) mixtures with partial cement replacement of 5, 10 and 15 % were designed for target strength of 90 MPa. From the results of the investigation, it was observed that 10% replacement level was the optimum level in terms of compressive strength. Beyond 10% replacement levels, the strength was decreased but remained higher than the control mixture. Compressive strength of nearly 106 MPa was achieved at 10% replacement. Splitting tensile strength and elastic modulus values have also followed similar trend. In durability performance tests MK concretes have exhibited high resistance compared to control concrete and the resistance increases as the metakaolin percentage increases. � 2013 Sustainable Construction Materials and Technologies. All rights reserved.