Le, Thi Thanh Tam, Mai Thi Hong Mai, Le Sy Chinh Le Sy Chinh, and Nguyen Van Lam Nguyen Van Lam. “PROPERTIES OF MORTARS USING SPENT COFFEE GROUNDS TO REPLACE A PART OF NATURAL RIVER SAND”. Hong Duc University Journal of Science 79, no. 09 (n.d.). Accessed November 13, 2025. https://hdujs.edu.vn/index.php/hdujs/article/view/965.