Tajunnisa, Y. ., Husin, N. A. ., Darmawan, M. S. ., Darmawan, M. F. ., Suwandi, & Shigeishi, M. . (2025). Environmental Effects of Sulphate on Conventional Concrete Based on Portland Composite Cement. IPTEK The Journal of Engineering, 9(1), 7–13. https://doi.org/10.12962/j23378557.v9i1.a16230