Fly Ash-based Geopolymer Binders: Perspective Materials for Sustainable Building

Abstract

The possibility of obtaining a geopolymer binder on the basis of fly ash of the Reft thermal power station and fine-grained concrete on its basis is investigated. It is shown that the chemical-mineral composition and properties of this fly ash allow it to be used as an aluminosilicate component without additional grinding and introduction of mineral additives. In this case, the alkaline activator is an industrial sodium liquid glass diluted to a density of 1200 kg/m3. The dependences of the strength of geopolymer binder and fine-grained concrete on its basis on the conditions of hardening, aggregate consumption and the sequence of mixing of components are established. Based on the fly-ash geopolimer and the screenings crushing granite dropout picked up the fine-grained concrete class B35. © 2019 Published under licence by IOP Publishing Ltd.