AGITA KABDIYONO, Era; LUTHFI HANAFI. The Effect of Coal Ash As a Sand Substitute on The Compressive Strength of Concrete. Jurnal Teknik dan Science, [S. l.], v. 5, n. 2, p. 100–112, 2026. DOI: 10.56127/jts.v5i2.2947. Disponível em: https://journal.admi.or.id/index.php/JTS/article/view/2947. Acesso em: 29 jul. 2026.