Evaluation of Split Tensile Strength of Fibre Reinforced MetakaolinBased Geopolymer Concrete

Abstract

Geopolymer concrete (GPC) are representing the most promising green and eco-friendly alternative to Ordinary Portland cement (OPC).FRMGPC contains Metakaolin, Alkali activated solution, fineaggregate, coarse aggregate and steel fibre.This paper deals with the results of anexperimental investigation of the split tensile strength of steel Fiber Reinforced Metakaolin based Geopolymer Concrete (FRMGPC)(M25). The fiber content varied from 0 to 2 % by weight of geopolymer binder (Metakaolin + GGBFS). Beams of 150mm x 150mm x 700 mm were tested for the flexural strength which was failed and broken in between middle third. The smaller broken piece was taken and tested for the split tensile test. A circular bar of 8mm diameter placed at a distance 150mm from the finished end on opposite faces and loaded till the failure and the tensile strength was found. Results and expressions by regression analysis are also obtained. A significant improvement in the split tensile strengths is observed due to inclusion of steel fibers in the geopolymer concrete.