Geo polymer concrete is known as one of environmental friendly construction materials. Using by product material such as flyash and metakaolin replace cement would avoid carbon dioxide CO2 emission during the manufacturing process of ordinary Portland cement OPC . The objective of his research work was to produce a carbon dioxide emission free cementious material. This paper discusses low calcium Flyash and metakaolin based geo polymer concrete with different proportion of binder and molarities. The alkaline liquids used in this study for the polymerization are the solutions of Sodium hydroxide NaOH and sodium silicate Na2Sio3 . In this paper variation of source material for low calcium Fly ash and Metakaoline and at various molarities like...