Systematic Review of the Use of Fly Ash in Geopolymer Concrete: Impact on Its Physical, Mechanical, and Microstructural Properties. ITEGAM-JETIA, [S. l.], v. 12, n. 57, p. 906–917, 2026. DOI: 10.5935/jetia.v12i57.3126. Disponível em: https://itegam-jetia.org/journal/index.php/jetia/article/view/3126. Acesso em: 22 oct. 2026.