Geopolymer Concrete under Ambient Curing

Abstract

Geopolymer concrete (GPC) has significant potential as a more sustainable alternative for ordinary Portland cement concrete. GPC had been introduced to reduce carbon footprints and thereby safeguarding environment. This emerging eco friendly construction product finds majority of its application in precast and prefabricated structures due to the special curing conditions required. Sustained research efforts are being taken to make the product suitable for in situ applications. The developed technology will certainly address the issues of huge energy consumption as well reduce water use which is becoming scarce nowadays. Ground Granulated Blast Furnace Slag (GGBS) a by-product of iron industries in combination with fly ash has proved to give enhanced strength, durability as well reduced setting time. This study investigates the effect of GGBS as partial replacement of fly ash in the manufacture of GPC. Cube and cylindrical specimens were cast and subjected to ambient curing as well to alternate wetting-drying cycles. The 28 day compressive strength, split tensile strength, flexural strength and density of GPC specimens were found. The study revealed increase in compressive strength, split tensile strength, density as well flexural strength up to 40 percent replacement of fly ash by GGBS.

Artificial intelligence-based prediction of strengths of slag-ash-based geopolymer concrete using deep neural networks

“…Contrary to Portland cement concrete, GPC requires a different mix design, and there is no any established standards for it yet. ACI 211-1 [108]'s procedure was modified and used for the mix design proportions as well as recommendations from literature [19,26,72,109]. In the course of mix design, specific gravity of all constituents, fineness moduli of fine aggregates, water absorption and moisture content of fine and coarse aggregates were put into consideration.…”