Influence of self-healing induced by polylactic-acid and alkanoates-derivates precursors on transport properties and chloride penetration resistance of sound and cracked mortar specimens

The possible beneficial impact of self-healing on chloride transport through cracks has been assessed for two bacteria-based mortar mixtures in comparison with Ordinary Portland cement mortar. Intact specimens featured lower coefficients thanks to a denser microstructure and the formation layer calcium carbonate their surface. However, cracked did not significantly reduce penetration during 28 days exposure compared non-healed specimens. On other hand, this study demonstrated that 150–200 µm wide reduced ingress shorter term (14 days) but results suggest water blockage (sealing) limited amount limestone formed creates an imperfect barrier against diffusion ions apparent porous limestone. short-term positive effect respect could be applications where is or non-permanent such as concrete structures irregularly exposed deicing salts located splash zone marine environments.