Umar AA, Musa UA. Durability Performance of Corn Cob Ash–Coconut Shell Ash Concrete Exposed to Simulated Oil Refinery Wastewater. JoCEF [Internet]. 2025Aug.26 [cited 2025Nov.1];6(02):58-69. Available from: https://www.jocivilef.org/index.php/jocef/article/view/118