Evaluation of oil palm shells and mask fiber on the flexural strength of pre- and post-corrosion concreteAhmad Zaki, Nida Mahpuzah, Saadatun Nisa, Seplika Yadi and Kharisma Wira NindhitaE3S Web Conf., 519 (2024) 04011DOI: https://doi.org/10.1051/e3sconf/202451904011