Irshidat, M.R. and Kailani, H.Y. 2025. Sustainable Utilization of Recycled Concrete Powder as Sand Replacement in Cement Mortar Production: Impact of Sand-Cement Ratio. Civil Engineering Journal. 11, 8 (Aug. 2025), 3375–3394. DOI:https://doi.org/10.28991/CEJ-2025-011-08-016.