Syafi’i A, Prahitaningtyas S, Hendrian S, Rismanto M, Faradilla HF. Synthesis of Coal-Fly-Ash Geopolymer for Sustainable Construction Material: Optimisation of Formulation and Environmental Characterisation. jist [Internet]. 2025Dec.28 [cited 2026Mar.25];6(12). Available from: https://jist.publikasiindonesia.id/index.php/jist/article/view/9175