Geopolymer concrete for pavement applications
Geopolymer concrete is a contemporary binding material which is emerging as a sustainable alternative to Portland cement concrete. Geopolymer is regarded as eco-friendly binder as against Portland cement because firstly, it has less greenhouse gas emission potentials. Secondly, it promotes 100% utilization of fly-ash thus addressing the several harmful effects caused by disposal of fly-ash into the atmosphere. Geopolymer is defined as an inorganic polymer consisting of chain like structure formed by key components such as Al and Si ions. The production of geopolymer involves alkali activation of source material which are rich in aluminosilicates. The chemical reaction between the source material and alkali activator is typically a polymerisation process. The mechanism is therefore called as geopolymerisation. Studies indicate that several research has been conducted and still in progress on understanding geopolymer cement chemistry, its behaviour and its potentials as a sustainable alternative to Portland cement for structural applications. However, the competencies of geopolymer concrete as a paving grade material is yet needed to be thoroughly investigated. If the geopolymer concrete is used as a paving grade material, investigation of its thermal conduction and fatigue behaviour become importance.
M G, Girish, "Geopolymer concrete for pavement applications" (2022). Technical Collection. 60.