Strength and Acid Resistance Evaluation of Geopolymer Concrete with Partial Replacement of Fly Ash by GGBS and Phosphogypsum. International Journal of Engineering Research and Science & Technology, [S. l.], v. 22, n. 1, p. 1857–1863, 2026. DOI: 10.62643/. Disponível em: https://ijerst.org/index.php/ijerst/article/view/3597. Acesso em: 11 nov. 2026.