Nasrudin NN, Ariffin NF, Alias A, Hasim AM, Zaimi MNS. Experimental Validation of Reinforced Concrete Beam Incorporating Coal Fly Ash and Coal Bottom Ash Using Numerical Analysis. IJIE. 2023;15(2):228-236. Accessed August 7, 2026. https://journal.uthm.edu.my/index.php/ijie/article/view/13334