EFFECTS OF FLY ASH, MAIZECOB ASH, AND GROUNDNUT SHELL ASH ON THE PROPERTIES OF SELF-COMPACTING GEOPOLYMER CONCRETE WITH GGBS BLEND

Abstract

Concrete stands as the ubiquitous human-made construction material worldwide, with ordinary Portland cement (OPC) being a fundamental component in conventional concrete mixes. However, the production of cement is associated with the release of carbon dioxide emissions. As responsible citizens Engineers and scientists are allowed to create a more sustainable world, by developing the practices of using a green building material. Geopolymer can be considered as the solution which can be produced without OPC and contributes less release of greenhouse gasses. Also, the performance of hardened concrete characteristics like surface quality, strength, and durability has been enhanced using self-compacting geopolymer concrete (SCGPC) technology. The key objective of this study was to examine how different ashes, such as fly ash (FA), maize cobash (MCBA), and groundnut shell ash (GSA), affected the blended SCGPC composed of ground granulated blast furnace slag (GGBS). In this study, the ratios of GGBS and ash used to make SCGPC were maintained at 50%:50%. Both SCGPC's fresh and hardened characteristics were identified. All ashes performed well, although FA and GGBS blended SCGPC blends were the best in both the fresh and hardened stages. Further, in this study, the experimental splitting tensile strength of SCGPC was compared to the predicted values from ACI 363R and CEB-FIP. The experimental SCGPC modulus of elasticity was compared to the expected values from ACI 363R and ACI 318.