Recycling of black slag for use as raw material in the construction sector. Case study ANDEC. Revista Universidad de Guayaquil, [S. l.], v. 128, n. 1, p. 34–44, 2019. DOI: 10.53591/rug.v128i1.1389. Disponível em: https://revistas.ug.edu.ec/index.php/rug/article/view/211. Acesso em: 5 dec. 2025.