Koshe Hareru W, Belayneh Asfaw F, Ghebrab T. Physical and Chemical Characterization of Coffee Husk Ash Effect on Partial Replacement of Cement in Concrete Production. ijscet. 2022;13(1):167-184. Accessed August 12, 2026. https://journal.uthm.edu.my/index.php/IJSCET/article/view/9509