EXPERIMENTAL STUDY ON M50 GRADE OF HPC MIX USING HIGHLY REACTIVE METAKAOLIN AND RICE HUSK ASH WITH RECRON 3S FIBRE

Namrata Ray, Pravat Kumar Parhi

Abstract: Concrete is one of the most durable building material and versatile in nature used for making many structures worldwise. In this technological world construction industries need to plan for effective utilization of waste materials(both natural and industrial byproduct) for improving production of concrete economically and aesthetically. For improving properties of concrete and to minimize use of cement which is a major component of concrete, partial replacement of cement is required as Global cement production is expected to increase from 3.27 billion metric tons in 2010 to 4.83 billion metric tons in 2030 which has a bad impact on environment .Cement production emits harmful CO2 gas leading to global warming, health disorders and so on. Earlier studies has shown that when Rice Husk Ash(RHA) used as partial cement supplement gradual decrease in strength is seen. Here experimental investigation has been carried out with respect to strength and durability study and other mechanical properties study on performance of HPC of M50 grade of concrete using HRM and RHA as partial replacement of cement with addition of Recron 3s fibre by weight of concrete. Recron 3s fibre controls and arrest cracks in concrete. Highly Reactive Metakaolin(HRM) which is a very reactive material used in different percentage(5%,10%,15% and 20%) along with constant 5%RHA and constant 7.5% RHA with addition of 0.2%Recron 3s fibre(RF) by weight of concrete for producing better modified concrete . Various strength parameters like compressive strength, split tensile strength and flexural strength are studied. Water absorption and Porosity test are also presented experimentally in this paper.From the experimental study, it was observed that when HRM and RHA are used as partial replacement of cement with addition of recron 3s fibre to weight of concrete, it improves the mechanical properties specially the porosity and water absorption decreases and gradual increase and then decease in compressive, split tensile, flexural strength.

Keywords: RHA, Highly Reactive Metakaolin, Recron 3s fibre, HPC mix, Durability, mechanical properties

DOI: https://doi.org/ 10.15623/ijret.2017.0610009