LIE, E. S.; RACHMANSYAH, R. Flexural Strength Ratio of Geopolymer Concrete with Addition of Superplasticizer. Jurnal Teknik Sipil, [S. l.], v. 19, n. 2, p. 265–277, 2023. DOI: 10.28932/jts.v19i2.6205. Disponível em: http://114.7.153.31/index.php/jts/article/view/6205. Acesso em: 18 jun. 2025.