Effect of Inclusion of Steel Fibres on the Properties of Geopolymer Concrete Composites

This paper presents the results of an experimental investigation on the mechanical properties of Geopolymer Concrete Composites (GPCC) containing 90% Fly ash (FA), 10% Ordinary Portland Cement (OPC), alkaline liquids and steel fibers. The study analyses the impact of steel fibres on the mechanical properties such as density, Compressive Strength, Split Tensile strength and Flexural strength of hardened GPCC. Mixtures were prepared with alkaline liquid to fly ash ratio of 0.4 with 10% of fly ash replaced by OPC in mass basis.Steel fibers were added to the mix in the volume fractions of 0.25%, 0.5% and 0.75%volume of the concrete. The influence of fiber content in terms of volume fraction on thecompressive, split tensile strength and flexural strengths of GPCC is presented. Based on the test results, empirical expressions were developed to predict 28-day compressive strength, split tensile strength and flexural strength of Steel fiber reinforced GPCC in terms of volume fraction of steel fiber.