The Effect of PET Coarse Aggregate Substitution on the 7-Day Normal Compressive Strength of Concrete: Evaluation of the Effect of PET Percentage Variation on the 7-Day Normal Compressive Strength of Concrete. Journal of Research and Inovation in Civil Engineering as Applied Science (RIGID), [S. l.], v. 5, n. 1, p. 29–36, 2026. DOI: 10.58466/mvffq463. Disponível em: https://jurnal.politap.ac.id/index.php/rigid/article/view/1974. Acesso em: 2 feb. 2026.