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.