Environmentally responsible building materials are now being researched and produced all over the world in an effort to reduce the generation of greenhouse gases and the worrisome rate at which natural resources are diminishing. Geopolymer serves a crucial role in this regard, and various researchers have looked into the many aspects of its suitability as a binding substance. Fly ash-based geopolymer concrete (abbreviated as GPC) has been made using ground granulated blast furnace slag (abbreviated as GGBS) to modify the geopolymerization reaction of fly ash. In order to ascertain how the amount of Alkaline Activated Solution (AAS) in the mixture of GPC affects the compressive strength of the GPC under ambient temperature, this paper examines the influence of various proportions of GGBS (0100%) on Fly Ash based GPC. From the results of the experiments, it was determined that the sodium silicate solution, in which the concentration of sodium hydroxide in the aqueous solution is fixed at a constant value of 10M, increases the compressive strength of the GPC both with an increase in the percentage of GGBS and also with an increase in the amount. Despite the fact that there was a little quantity of sodium hydroxide in the solution remained the same