Zinab Mubark Issa and Somaya Massoud Abdo 2025. Effect of Adding Sand on Cement Mixtures: An Experimental Investigation of Compressive Strength Using Portland Cement and Nalut Sand. Libyan Journal of Contemporary Academic Studies. 3, 2 (Dec. 2025), 160–177. DOI:https://doi.org/10.65417/ljcas.v3i2.252.