M. Mansour, M. H. Ismail, M. H. Wan Ibrahim, N. Mokhtar, and A. F. Al Shalif, “Combined Influence of Metakaolin and Palm Oil Fuel Ash on the Heat of Hydration and Permeability of High Performance Concrete”, IJIE, vol. 17, no. 5, pp. 215–226, Aug. 2025, Accessed: Apr. 09, 2026. [Online]. Available: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/16892