Manufacture of Spongy Gravel from Obsidian to Produce Lightweight and Thermal-Insulating Concrete. Iraqi Journal of Science, [S. l.], n. 7, p. 2286–2295, 2021. DOI: 10.24996/ijs.2021.62.7.17. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/3602.. Acesso em: 2 may. 2024.