In order to address environmental effects associated with Portland cement, there is need to develop alternative binders to make concrete. An effort in this regard is the development of Geopolymer concrete, synthesized from the materials of geological origin or by product materials such as fly ash, which are rich in silicon and aluminum. This paper presents results of an experimental study on the compressive strength of Geopolymer concrete. The experiments were conducted on three types of different mixes (M1,M2,M3) containing different amount of sand and Quarry Dust with sunlight curing. The replacement of cement with fly ash is 100%with 10 Molarity of alkaline solution. The ratio of alkaline liquid to fly ash was fixed as 0.4. For all the samples the rest period was kept as 2 days. The compressive strength test was conducted for each sample and the results showed that there is an increase in compressive strength with the increase in age of specimens. The mix M1 containing 40% sand 60% Quarry Dust shows higher compressive strength as it may replace our conventional concrete.