SIREGAR, S. M.; HUMAIDI, S.; BUKIT, N.; FRIDA, E. Palm Oil Fuel Ash and Fly Ash for a Partial Replacement of Cement in High-Quality, Environmentally Friendly Mortar as a Solution to Industrial Waste. Science and Technology Indonesia, [S. l.], v. 9, n. 1, p. 59–68, 2024. DOI: 10.26554/sti.2024.9.1.59-68. Disponível em: https://www.sciencetechindonesia.com/index.php/jsti/article/view/834. Acesso em: 1 may. 2026.