Parametric Study on Strength Performance of Geopolymer Concrete Using Industrial By-Products

Green building materials are being developed around the world to limit the demand for rapidly depleting environmental assets, including greenhouse gas emissions. Geopolymers are significant in this environment, and various studies have considered a range of substances as suitable binder materials. In this dissertation, the workability and mechanical properties of geopolymer concrete mixes made using industrial by-products such as fly ash (FA) and Ground Granulated Blast Furnace Slag (GGBS) was determined by varying the FA and GGBS proportions (0–100%) with an interval of 10%, Molarity (8–14 M) and alkaline binder (A/B) ratios (0.40, 0.45, 0.50, 0.55, 0.60 and 0.61). For all mixes, the binder content (550 kg/m3) and alkaline activator ratio (1:2.5) were kept constant. Variations in the sodium hydroxide (NaOH) concentration and alkaline activator-binder ratio were used to determine how efficiently the compressive and tensile strengths were performed at ambient temperature. The experimental results shows that the increase in slag content improved the strength but reduced the workability, and the analysis for 28 days shows that the 70:30 proportion of FA and GGBS, the sodium hydroxide concentration of 13 M, and the 0.55 alkaline binder ratio has given the optimum compressive and split strengths with better workability.