Fly Ash-Based Geo Polymer Concrete

To reduce greenhouse gas emissions, efforts are needed to develop environmentally friendly construction materials. This paper presents the development of fly ash-based geopolymer concrete. In geopolymer concrete, a by-product material rich in silicon and aluminum, such as (ASTM C 618 Class F) fly ash, is chemically activated by a highalkaline solution to form a paste that binds the loose coarse and fine aggregates, and other unreacted materials in the mixture. The test results presented in this paper show the effects of various parameters on the properties of geopolymer concrete. The applications of geopolymer concrete and future research needs are also identified. Fly ash, considered to be a waste material is rich in silica and alumina and hence can be used as a source material for manufacture of Geopolymers. These binder shave been reported to achieve high early strength and better durability as compared to Ordinary Portland cement based counterparts.