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://acspublisher.com/journals/index.php/ijircst/article/view/10308.. Acesso em: 23 jul. 2024.