Darwesh, Omar, Otman M.M. Elbasir, and Manssour Bin Miskeen. “Effect of Binary Blended of Portland Cement and Fly Ash to the Strength and Surface Absorption of Concrete”. Journal of Pure & Applied Sciences 20, no. 4 (January 17, 2022). Accessed December 22, 2024. https://sebhau.edu.ly/journal/jopas/article/view/1711.