An Experimental study on properties of fly ash based geopolymer concrete by using recycled concrete aggregate

To scrutinize the performance of fly ash based Geopolymer concrete. Geopolymer concrete includes coarse aggregate, fine aggregate, alkaline liquid, fly ash and water. The alkaline liquid is a fusion of sodium silicate and sodium hydroxide. To make alkaline liquid solution, sodium hydroxide solids were added with the water about 5 minutes. Then, the sodium hydroxide solution was blended with the sodium silicate. This liquid was prepared one day before of mixing day. The fly ash used Geopolymer concrete is more environmentally friendly and the potential to take over from OPC concrete in many applications such as precast units. Geopolymer technology does not only grant to the rebate of greenhouse gas emission but also reduced disposal cost of industrial waste. The significance of recycled aggregate addition on the fresh and hardened properties of geopolymer concrete is completely reviewed in this paper. The optimal mix combination was taken for casting of reinforced concrete beam and to search the strength and durability properties were captured with concrete with hardened and fresh concrete.