Experimental Investigation on Fly ASH-GGBS Based Geopolymer Concrete with Slaked Lime under Ambient Curing

Abstract

Geopolymer Concrete (GPC) is an important substitute binder to Portland cement concrete. Geopolymer concrete generally needs heat curing or steam chamber curing for effective polymerization reaction on the concrete specimens. Self- curing methods are implemented to get better properties of the geopolymer concrete, Since heat curing method has more practical challenge. The objective of the research paper was to produce a geopolymer concrete with the use of a chemical additive such as quick lime under ambient curing and to improve the properties of GPC thereby to eliminate the need of heat curing in the concrete. The mixture of fly ash and GGBS shows a reasonable gain in strength of GPC even in a short period of curing. The alkaline liquids used in this experimental study are 8M of sodium hydroxide and sodium silicate solution. In this study, the chemical additive such as quick lime was added 1%,2%,3%,4%,5% and 6% by weight of aluminosilicate materials like fly ash and GGBS. The companion specimen's cube, cylinder, and prism were cast and cured under ambient room temperature for 28 days. The properties of modified GPC increases compared to control geopolymer concrete with no addition of chemical additive specimens cured under ambient room temperature for 28 days. It was examined that mix Id GPC8-5 provides better performance in all aspects.