Utilizing recycled crushed glass to produce green cementmortar

This research used recycled crushed glass to substitute for fine aggregate partially. Three grinding degrees were considered to produce recycled crushed glass with different particle size distributions grinding degrees. The grinding degrees were based on the griding time, which was 10, 20, and 30 minutes for the 1st, 2nd, and 3rd degrees, respectively. A reference mixture was designed with Zero sand replacement, and then Five cement mortar mixtures were designed for each glass grinding degree where the fine aggregate was partially replaced with recycled crushed glass with ratios of 5%, 10%, 15%, 20%, and 25%. In addition to a reference mixture, 15 mixtures were prepared for the case when fine aggregate was partially replaced with crushed glass. Fresh cement mortar tests, including slump and density, were conducted for each mixture. Also, a cement mortar compressive strength test was carried out at the age of 3, 7, and 28 days. Moreover, cement mortar flexural and splitting tensile strength at the age of 28 days, testing was performed. The second crushed glass grinding degree shows the best compressive strength results at a replacement ratio of 5%, while the first crushed glass grinding degree shows the best flexural strength result at a replacement ratio of 5%. However, the results show a decrease in the splitting tensile strength when compared to the reference mix for all the grinding degrees and at all the replacement ratios.