Abstract
The high strength geopolymer concrete and its properties are evaluated by using ground granulated blast furnace slag. In this research fly ash replaced by ground granulated blast furnace slag and its percentage of replacement is 20%, 40%, 60%, 80% and 100% by the weight of flyash and its cured by ambient temperature. Using trial and error method to get M20 grade geopolymer concrete. The source materials physical properties are tested in material test laboratory. In this project fresh and harden concrete properties and durability properties are evaluated. The specimen casting, curing and the mechanical, durability, flexural performance evaluated. The slump results shows GGBS content increase similarly reduce the workability of concrete. the grade of geopolymer concrete is achieved M20 to M80. 100% GGBS blended GPC achieved M80 grade GPC. Similarly split tensile strength and modulus of rupture also increased due to GGBS. 100% GGBS blended GPC beam achieve optimum load carrying capacity and withstand more deflection compare to 100% flyash blended GPC beam. This project clearly proven flyash ash 100% replaced by GGBS mix achieved high strength geopolymer concrete.