S. O. Folagbade, “Initial Surface Absorption of Cement Combination Concretes Containing Portland Cement, Fly Ash, Silica Fume and Metakaolin”, ijscet, vol. 8, no. 2, pp. 46–56, Dec. 2017, Accessed: Aug. 13, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/IJSCET/article/view/1495