Effect montmorillonite clay as aggregate in lightweight concrete cement-free. Periodicals of Engineering and Natural Sciences, [S. l.], v. 10, n. 2, p. 147–154, 2022. DOI: 10.21533/pen.v10.i2.589. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/589. Acesso em: 13 may. 2026.