A Study on Utilization of Rice Husk Ash and Waste Paper Sludge Ash as Partial Replacement of Cement in Concrete . International Journal of Innovative Research in Computer Science & Technology, [S. l.], v. 10, n. 6, p. 29–34, 2022. DOI: 10.55524/. Disponível em: https://journals.acspublisher.com/index.php/ijircst/article/view/10308. Acesso em: 31 jul. 2025.