JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY, vol.24, no.May–June 2023, pp.8533-8546, 2023 (SCI-Expanded)
The influence of waste glass powder (WGP) with fly ash in certain proportions was considered by exchanging different proportions of molarity and WGP percentage on geopolymer concrete (GPC). For this objective, fly ash was altered with WGP having percentages of 10%, 20%, 30%, and 40%, and the effect of molarity of sodium hydroxide (NaOH) was examined. The compressive strength tests, splitting tensile tests, and flexural strength tests were conducted. The workability and setting time were also evaluated. With the addition of WGP, the workability for molarities (M) of 11, 13, and 16 NaOH reduced by an average of 17%, 10%, and 67%, individually. The findings exhibited that the slump values decreased as the molarity and waste glass percentages increased. Molarity significantly affected the setting time, but WGP had no effect on the setting time. Although high molarity increases the capacity, this had a noticeable negative effect on the setting time and workability. This study showed that WGP had a slight negative effect on the capacity and workability. Furthermore, when the combined effect of WGP and NaOH molarity were taken into account, the use of 10% WGP with M13 NaOH was recommended to obtain the optimum sustainable GPC considering both fresh and hardening properties. Scanning electron microscopy (SEM) analysis was done on the sample pieces, too.