M. I. RIDZUAN and . M. H. . OSMAN, “Innovative Lightweight Concrete Incorporating Pumice Stone and Palm Oil Fuel Ash”, peat, vol. 6, no. 2, pp. 95–100, Oct. 2025, Accessed: Apr. 07, 2026. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/21077