Ho Viet Thang, Tran Thi Thanh Phuong, Le Thi Ngoc Quy. Partial replacement of natural sand with recycled waste oyster shells in concrete production of grade 30 MPA. JOMC [Internet]. 2026 Apr. 6 [cited 2026 Apr. 9];16(01). Available from: https://ojs.jomc.vn/index.php/en/article/view/1240