Effect of Elevated Temperature on Conventional Concrete by Relacing Cement Partially with Metakaolin

Metakaolin is a cementations materials used as an admixture to produce high strength concrete and is used for maintaining the consistency of concrete. Metakaolin is a valuable admixture for concrete or cement applications and it is a pozzolonic additive product which can provide many specific features. Amongst the various methods used to improve the durability of concrete, and to achieve high performance concrete, the use of Metakaolin is a relatively new approach. The present study includes the effect of partial replacement of cement with metakaolin by various percentages (0%, 10%, 15%, 20%) on the properties of M-25 grade of concrete, when it is subjected to high temperature of 2000C – 10000C. The concrete mixes were prepared by replacing 0,10,15 and 20% mass of cement by Metakaolin. The specimens were heated to different temperatures of 2000C, 4000C, 6000C, 8000C, 10000C for durations of 1 hours at each temperature. The results conclude that the use of Metakaolin Concrete (MKC) has improved the performance of concrete under various temperature conditions. The test result revealed that 15% replacement of OPC by metakaolin increases the strength of concrete.