Study of Modulus of Rupture on Geopolymer Concrete Temperature Difference Methods of Steam CuringMuhammad Ujianto, Masni A. Majid, Zakaria Sulthon Aulia, Yenny Nurchasanah, Budi Setiawan and Abdul RochmanE3S Web of Conf., 517 (2024) 12007DOI: https://doi.org/10.1051/e3sconf/202451712007