“COMPARITIVE STUDY OF MECHANICAL PROPERTIES OF GEOPOLYMER CONCRETE WITH STEEL FIBERS AND POLYPROPYLENE”

Abstract

This paper presents the relative results of an experimental investigation on the mechanical
properties of Geopolymer concrete (GPC), Geopolymer Concrete Composites (GPCC) containing 30% Fly
ash (FA), 70% Ground Granulated Blast Furnace Slag (GGBS). Sodium based alkaline liquid is used as an
activator. The study also analyses the impact of steel fibers and polypropylene fibers on the workability
and mechanical properties of GPCC. Steel fibers were added to the mix in the volume fractions of 0.25%,
0.5%, 0.75% ,1%,1.25% and 1.5% volume and polypropylene fibers 1% to 5% of the concrete. From the
results it is observed that as the age of concrete increases the mechanical properties of GPCC are found to
be improving significantly. Inclusion of steel fibers resulted in improved compressive and flexural
strengths at the early ages. However tensile strength is found to be improved significantly at later stages.