Karyawan, I.D.M.A. et al. 2023. Characteristics of Asbuton Mix Using Geopolymer Fly Ash Coarse Aggregate as a Substitute for Natural Aggregates . Jurnal Penelitian Pendidikan IPA. 9, 6 (Jun. 2023), 4156–4163. DOI:https://doi.org/10.29303/jppipa.v9i6.3937.