Evaluating Strength Of Concrete Using Bottle Caps And PET. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 4, n. 3, p. 623–630, 2017. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/2139. Acesso em: 8 sep. 2025.