Study the effect of glass fibers and polypropylene fibers on the mechanical properties of concrete. Scientific Journal for Publishing in Health Research and Technology, [S. l.], v. 1, n. 2, p. 54–64, 2025. DOI: 10.65420/sjphrt.v1i2.16. Disponível em: https://sjphrt.com.ly/index.php/sjphrt/article/view/16. Acesso em: 9 dec. 2025.