Strength enhancement and self-healing mechanisms in m45 high-strength concrete incorporating bacillus subtilis: an experimental laboratory study. SJ Engineering Africa, [S. l.], v. 3, n. 2, p. 8, 2026. DOI: 10.51168/w9gv2670. Disponível em: https://engineering.sjpublisher.org/index.php/eng/article/view/36. Acesso em: 24 apr. 2026.