A. G. Elkhebu, A. Zainorabidin, H. B. K. Bujang, I. H. Bakar, L. A. Abdeljouad, and W. khalef Dheyab, “Alkaline activation of clayey soil using Potassium hydroxide & Fly ash”, ijie, vol. 10, no. 9, Jan. 2019, Accessed: Jul. 23, 2024. [Online]. Available: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/2477