Burhanudin, Mohd Khairy, Mohd Haziman Wan Ibrahim, Ramadhansyah Putra Jaya, and B. Sri Umniati. 2023. “Characterisation of Ground Coal Bottom Ash With Different Grinding Times ”. International Journal of Sustainable Construction Engineering and Technology 14 (3): 49-56. https://penerbit.uthm.edu.my/ojs/index.php/IJSCET/article/view/13841.