Concrete is a mix of coarse and fine aggregate with a suitable binder in presence of water. The primary and most widely used binder in cement. Among all of the raw material used in the preparation of concrete cement is the one with the highest embodied energy and its manufacturing have adverse effects on environment. Thus various researches have been made towards the replacement of cement as a binder. This paper is a review of the researches made towards replacement of cement with alkali activated fly ash based geopolymer binder and the physical properties of the geopolymer concrete thus produced. Geoolymer binder is a result of chemical reaction alkali solution i.e. a mix of sodium hydroxide and sodium silicate with the high alumina content of fly ash or other sources with high alumina content, which leads to formation of a ring like structure (-Al-O-Si-O-).
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