LASCO, Jonathan David; MADLANGBAYAN, Marish; SUNDO, Marloe Baclayon. Compressive Strength and Bulk Density of Concrete Hollow Blocks (CHB) with Polypropylene (PP) Pellets as Partial Replacement for Sand. Civil Engineering Journal, [S. l.], v. 3, n. 10, p. 821–830, 2017. DOI: 10.28991/cej-030917. Disponível em: https://www.civilejournal.org/index.php/cej/article/view/459. Acesso em: 28 jun. 2025.