 This research examined the use of manufactured sand as a replacement for natural sand in alkali-activated sustainable mortar. It found that when the ratio of manufactured sand to precursors was between 0.6 and 0.8, the compressive, tensile, and flexural strengths of the mortar increased before declining. Additionally, the mortar's permeability and crack resistance also improved with increasing SSPR. At an SSPR of 0.7, the mortar had the highest compressive strength, tensile strength, flexural strength, anti-permeability, and cracking resistance. This suggests that manufactured sand may be a viable alternative to natural sand in alkali-activated sustainable mortar. This article was authored by Zheng Peng, Wang Tsong, Wang Fei, and others.