STUDY ON THE PERFORMANCE OF CONCRETE USING METAKAOLIN WITH NATURAL FIBRES

Abstract

In recent years, there has been a growing interest in utilization of metakaoline in concrete as partial substitution is addition to cement due to its high pozzolanic activity. In the present work an attempt has been made to study the suitability of metakaolin as a mineral admixture and its effect on the properties concrete. Concrete mixes were made using Ordinary Portland Cement alone as Control and also replacing cement by 5%, 10%, 15%, 20%, 25% and 30% of metakaolin. In this experimental investigation, workability, strength and durability of concrete mix with partial replacement of cement by metakaolin and with and without coir fibres has been studied. The results obtained shows that at 15% replacement of OPC with metakaolin have higher compressive strength as compared to the other replacement levels. The workability of concrete has reduced due to the addition of coir fibres in the concrete. The durability of the coir fibre reinforced concrete was affected in the alkaline exposure.Hence the coir fibre has stability in metakaolin based concrete, in resistance the cracks even after exposure to the alkaline environment.