Durability Assessment of Sustainable Mortar by Incorporating the Combination of Solid Wastes: An Experimental Study

The excessive mining of high-quality river sand for cement sand mortar resulted in environmental impacts and ecological imbalances. The present study aims to produce sustainable mortar by combining solid waste such as desert sand, stone dust, and crumb rubber to fully replace river sand. In addition, replacing cement with silica fume helps reduce the environmental carbon footprint. The present research prepared three types of mortar mixes: natural dune sand mortar (M۱), natural dune sand stone dust crumb rubber mortar (M۲), and natural dune sand stone dust crumb rubber silica fume mortar (M۳). The developed mortar samples were examined at ambient and elevated temperatures of ۱۰۰°C, ۲۰۰°C, and ۳۰۰°C for ۱۲۰ minutes. Furthermore, ۳ cycles of ۱۲ hours each at freezing temperature (-۱۰° ± ۲°C) and crushed ice cooling (۰° to -۵°C) were also tested. Results of the study showed an increment in compressive strength values in M۱, M۲, and M۳ mortar mixes (up to ۲۰۰°C). Later, an abrupt drop in the compressive strength was noticed at ۳۰۰°C in all mixes M۱, M۲, and M۳, respectively. The mix M۳ combinations resist heating impacts and perform significantly better than other mixes M۱ and M۲. Also, M۳ combinations resist the cooling effect better than M۱ and M۲. It can be concluded that the mortar mix M۳ with desert sand, stone dust, crumb rubber, and silica fume combination is considered the best mix for both heating and cooling resistance. Hence, the developed sustainable mortar M۳ combination can be utilized in all adverse weather conditions. Doi: ۱۰.۲۸۹۹۱/CEJ-۲۰۲۳-۰۹-۱۱-۰۹ Full Text: PDF

کلیدواژه ها:

Desert Sand ، Stone Dust ، Crumb Rubber ، Silica Fume ، Sustainable Mortar.