Use of Waste Paper Sludge Ash as Supplementary Cementious Material in M20 Concrete . International Journal of Innovative Research in Engineering & Management, [S. l.], v. 10, n. 5, p. 6–11, 2023. DOI: 10.55524/ijirem.2023.10.5.2. Disponível em: https://acspublisher.com/journals/index.php/ijirem/article/view/11046.. Acesso em: 22 jul. 2024.