Azmi M. R., and Ismail M. H. “A Review: Performance Of Reinforced Concrete Beam With Metakaolin And Palm Oil Fuel Ash Subjected To Three – Point Loading”. Recent Trends in Civil Engineering and Built Environment 2, no. 1 (May 31, 2021): 171–180. Accessed August 15, 2026. https://periodical.uthm.edu.my/index.php/rtcebe/article/view/1355.