Experimental investigation on Compressive Strength of Combined fiber reinforced Geopolymer concrete

Abstract

Ordinary Portland cement (OPC) production produces substantial CO2 emissions, which is a green house gas causing global warming. To address the environmental constraints due to cement production, strength properties of high-calcium fly ash based geopolymer concrete have been explored in this research article. This research article is aimed at finding the effect of combination fibers (Soft and Rigid) on compressive strength of Geo polymer concrete. Two different Ground Granulated Blast Furnace Slag (GGBS) to Fly Ash (FA) ratios (60:40 and 40:60) and three molarity of alkaline activators 8, 10 and 12 are used. Fiber combinations R0S10, R2S8, R4S6, R6S4, R8S2 and R10S0 are used. Three identical specimens of size 100 mm were used for each variation were cast and tested for 7 days and 28 days ambient curing. A parameter called ‘’Modified Binder Index’ is introduced to quantify the effects of molarity of alkaline activator, GGBS to fly ash ratio and fiber effect on compressive strength of Combined Fiber Reinforced Geo Polymer Concrete is presented