An experimental approach on Geopolymeric recycled concrete using partial replacement of industrial byproduct

Geopolymer concrete is an advance technology in concrete technology by partial replacement of bonding material (cement) with fly ash after geopolymerization. The geopolymerization chemistry has been conducted by heating the mixture of a specified proportion of fly ash (carbon content <5%), sodium hydroxide (NaOH) and water (H₂0) to a temperature of 60°C to 80°C. Fly ash sample collected from National Aluminum Company (NALCO) of Angul, Odisha having 0.5% carbon content, has been polymerized as per Indian Standard to the referred degree of precision and different samples of different percentage of replacement has been prepared to produce geopolymer concrete. In the investigation, an attempt has been made in preparing concrete of M₂₀ and M₂₅ grade. This clearly reflects an ambience towards reutilization of industrial waste that creates environmental pollution to the society visa-vis reducing the cost of concrete due to replacement of cement by fly ash.