Sustainable utilization of polyethylene terephthalate in producing local precast flooring concrete slabs. Periodicals of Engineering and Natural Sciences, [S. l.], v. 7, n. 4, 2019. DOI: 10.21533/pen.v7.i4.1683. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/1683. Acesso em: 3 aug. 2026.