Fly ash-based geopolymer concrete

In recent years, attempts to increase the utilisation of fly ash to partially replace the use of Portland cement in concrete are gathering momentum. Geopolymer concrete is a `new' material that does not need the presence of Portland cement as a binder. Instead, activating the source materials such as fly ash that are rich in Silicon (Si) and Aluminium (Al) using high alkaline liquids produces the binder required to manufacture the concrete. Hence, concrete with no cement. This paper presents information on fly ash-based geopolymer concrete. The paper covers the material and the mixture proportions, the manufacturing process, and the influence of various parameters on the properties of fresh and hardened concrete.