Rantung, Dilan, SupitSteve W.M., and Seska Nicolaas. “Effects of Different Size of Fly Ash As Cement Replacement on Self-Compacting Concrete Properties”. Journal of Sustainable Engineering: Proceedings Series 1, no. 2 (September 30, 2019): 180-186. Accessed April 27, 2024. http://seps.unsrat.ac.id/journals/index.php/joseps/article/view/25.