Concrete is the second most used product in the world after water, however consuming more amount of Cement is not good for our planet, because this Cement itself contributes 7% of the worlwide carbon dioxide emission. Although, Cement cause serious effects to our environment, we can’t eliminate Cement completely in construction practise, especiall in India, because in India most of the structures are built using concrete material, wehere cement is the main ingrediant for concrete, however, this is not the similar case in other countries for instance in western countries like United States of America, and Canada, are covered with high rise structures which is built by steel, and individual houses are built using woods. So, to control the carbon emission, geopolymer concrete was introduced into the civil field, in geopolymer concrete Cement can be completely eliminated, instead Cement, other cementitous materials can used for instance Fly ash and GGBS, and Alkaline Activated Content can be used to enhance the polymerization process. So, in this paper, it is mainly discussed about geopolymer concrete with Fly Ash and GGBS with differement mix ratio: 100% Fly Ash 0% GGBS, 100% GGBS and 0% Fly Ash, 50% GGBS and 50% Fly Ash, 75% GGBS and 25% Fly Ash, finally 75% Fly Ash and 25% GGBS. For different mix proportions mechanical properties of Geopolymer Concrete were determined such as Compressive Strength, Split Tensile Strenght, and flexural strength