Self-compacting Geopolymer Concrete (SCGC) is an innovative construction material in concrete technology. Geopolymer concrete has high viscosity and due to which it fails because of lack of compaction. Hence, in order to overcome this issue, concept of self-compacting geopolymer concrete has been introduced. Self - compacting concrete does not need any compaction efforts, to achieve full compaction and utilizes supplementary cementitious materials (SCM) in addition with alkaline solutions like Sodium hydroxide and sodium silicate and super plasticizer as a binder for matrix formation and strength. In the present study, fly ash and GGBS based SCGC replaced with various alkaline activator ratios. The concrete specimens were cured in ambient temperature. In this experimental work, the effect of sodium hydroxide concentration on fresh properties and compressive strength of fly ash based SCGC was investigated. © IAEME Publication