The effect of molarity and steel fibers on compressive strength of fiber reinforced geopolymer concrete

Abstract

This article contains the effect of different alkaline activators [1] (8M, 10M and 12M) on Compressive Strength of Steel fiber Reinforced Geopolymer Concrete (SFRGPC). Two different proportions of Ground Granulated Blast Furnace Slag (GGBS) and Fly ash (60%GGBS: 40%F and 40% GGBS: 60%F) were used in the present study. The combination of sodium Hydroxide (NaoH) and Sodium Silicate (Na 2 Sio 3 ) are used as a alkaline activators. SFRGPC is produced by adding different volume fractions of Hooked end steel fibres to the GPC. The Hooked end steel fibres were added to the Geopolymer concrete(GPC) in the volume fractions[2] of 0%,0.5%,0.7%,0.9% & 1.1% (R 0 ,R 5 ,R 7 ,R 9 ,&R 11 ) of Geopolymer concrete. Three identical cube specimens of size 100mm, for each variation, were cast and tested after 7 days and 28 days of ambient curing for average strength. The Modified Binder Index (B mi )[3] is introduced to quantify the effect of Binder Index(Bi)[4] and steel fibre effect(f eff ) on compressive strength of Steel Fibre Reinforced Geopolymer Concrete. The effect of molarity, GGBS:Fly Ash ratio and the steel fibers on compressive strength of SFRGPC is presented in this paper.