The high consumption of cement in the construction industry has encouraged the utilization of nanosilica synthesized from fly ash through the precipitation method as a partial substitute for cement in mortar mixtures. This study used 5 cm × 5 cm × 5 cm cube mortar specimens with a water/cement ratio of 0.485 and nanosilica variations of 0%, 3%, 6%, 9%, and 12% by weight of cement. The tests i…