Binder index as criteria for assessing the strength of geopolymer concrete

Abstract

Geopolymer is being developed as new the binder, instead of cement paste, to produce concrete. The geopolymer paste binds with coarse aggregates, fine aggregates together to form the Geopolymer Concrete (GPC). Several investigators used the industrial bye products such as Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBS) in combination with alkaline activator solutions in producing the Geopolymer binders. The published literature has revealed several variables that are affecting the strength of GPC. This paper presents a new parameter called ‘Binder Index’ which combines the effect of different parameters and it may be considered as unique parameter influencing the compressive strength of GPC and thereby help in development of binder index based criteria for mix design of GPC.