The role of bacterially induced calcite precipitation in self-healing of cement paste

Microbially-Induced-Calcite-Precipitation (MICP): A biotechnological approach to enhance the durability of concrete using Bacillus pasteurii and Bacillus sphaericus

“…The produced cracks facilitate the entry of water, gases, salts, acids, and other agents into the concrete’s matrix, thus, accelerate its degradation, corrosion, and shorten the service life of the structure. Remarkably, the maintenance of concrete structures significantly impacts the community budgets and environment [ 4 , 5 ]. Also, traditional methods of repairing have some disadvantages, such as, operation restrictions during reconstruction, different thermal expansion coefficient of matrix base and added material, as well as environmental hazards [ 6 ].…”

“…Developing bio-based self-healing concrete aims to reduce cracking-related durability issues. Therefore, researchers are trying to exploit self-healing approaches [ 2 , 4 , 5 , 7 , 8 , 9 , 10 , 11 ]. Novel biomaterials, based on the enhancement of calcite-precipitation have been developed for self-healing of cracks [ 5 , 7 , 8 , 12 ].…”

“…Therefore, researchers are trying to exploit self-healing approaches [ 2 , 4 , 5 , 7 , 8 , 9 , 10 , 11 ]. Novel biomaterials, based on the enhancement of calcite-precipitation have been developed for self-healing of cracks [ 5 , 7 , 8 , 12 ]. Microbial-induced-calcite-precipitation (MICP) is a bioprocess by which selected microorganisms can precipitate calcite through different pathways [ 5 , 10 , 13 ].…”

“…Novel biomaterials, based on the enhancement of calcite-precipitation have been developed for self-healing of cracks [ 5 , 7 , 8 , 12 ]. Microbial-induced-calcite-precipitation (MICP) is a bioprocess by which selected microorganisms can precipitate calcite through different pathways [ 5 , 10 , 13 ]. The addition of selected microorganisms into cementitious materials is considered cost-effective and eco-friendly method for micro-cracks repair.…”

“…The addition of selected microorganisms into cementitious materials is considered cost-effective and eco-friendly method for micro-cracks repair. Microbial self-healing is a very promising technique, because it is a continuous process for healing of micro-cracks, leading to substantial improvement in the physico-mechanical properties of bioConcrete [ 2 , 4 , 5 , 12 , 14 ]. Therefore, microbial self-healing can increase the service life of concrete structures without using costly and/or time consuming interventions [ 15 , 16 ].…”