Experimental Evaluation of the Compressive Strength of Fiber Reinforced Geopolymer Concrete (FRGPC)

Abstract

The experimental program consisted of determination of the compressive strength of the Fiber Reinforced Geo polymer Concrete (FRGPC) by casting and testing cubes of size 100 mm. Two different fibers namely Rigid and soft fibers are used. Two different Ground Granulated Blast Furnace Slag (GGBS), to Fly Ash (FA) ratios (60:40, 40:60) are used. Three different alkaline molar activators 8, 10 and 12 are used. Rigid fibers of volume fractions 0.2, 0.4, 0.6 and 0.8 (R2, R4, R6 and R8), are used for making the Rigid fiber reinforced Geo polymer concrete (RFRGPC). Soft fibers of volume fractions 0.2, 0.4, 0.6 & 0.8 (S2, S4, S6 and S8), are used for making the Soft fiber reinforced Geo polymer concrete (SFRGPC). For making combined fiber reinforced Geo polymer concrete (CFRGPC), combined fiber combinations R0S10, R2S8, R4S6, R6S4, R8S2 and R10S0 are used. Three identical specimens for each variation were cast and tested for 7 days and 28 days ambient curing. Two Parameters called ‘Binder Index and Modified Binder Index ‘is introduced to quantify the effects of molarity, GGBS to fly ash ratio and fiber effect on compressive strength of Fiber Reinforced Geo Polymer Concrete is presented