Feasibility assessment of newly isolated calcifying bacterial strains in self-healing concrete

In the present study, rarely explored spore former (Bacillus safensis & Bacillus pumilus) and non-spore (Arthrobacter luteolus, Chryseomicrobium imtechense Corynebacterium efficiens) alkaliphilic calcifying microbes were evaluated for their prolonged survival in cementitious environment. Extensive experimental program was designed to examine mechanical, self-healing, microstructural modifications durability of self-healing concrete (SHC). Results endorsed all bacterial strains harsh environment along-with improved mechanical response matrix. Moreover, investigated capable precipitating copious amount calcite having maximum 0.8 mm average crack healing with 86 % strength recovery. Densification microstructure evident from evaluation pore refinement. SHC portrayed a significant resistance 50 20 against Cl- penetration sulphate attack. Conclusively, these have potential impart sustainability structures by extending structural life, subsiding repairs cost conserving natural resources.