Osman, M. H., Adnan, S. H. ., Wan Jusoh, W. A., & Mazlin, N. I. . (2020). The Properties of Concrete Containing Palm Oil Fuel Ash and Expanded Polystyrene Beads. International Journal of Integrated Engineering, 12(9), 78-86. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5552