Lie, Ester Surya, and Rachmansyah Rachmansyah. “Flexural Strength Ratio of Geopolymer Concrete With Addition of Superplasticizer”. Jurnal Teknik Sipil 19, no. 2 (October 1, 2023): 265–277. Accessed May 15, 2024. https://journal.maranatha.edu/index.php/jts/article/view/6205.