title: Application of microorganisms in concrete: a promising sustainable strategy to improve concrete durability.
abstract: The beneficial effect of microbially induced carbonate precipitation on building materials has been gradually disclosed in the last decade. After the first applications of on historical stones, promising results were obtained with the respect of improved durability. An extensive study then followed on the application of this environmentally friendly and compatible material on a currently widely used construction material, concrete. This review is focused on the discussion of the impact of the two main applications, bacterial surface treatment and bacteria based crack repair, on concrete durability. Special attention was paid to the choice of suitable bacteria and the metabolic pathway aiming at their functionality in concrete environment. Interactions between bacterial cells and cementitious matrix were also elaborated. Furthermore, recommendations to improve the effectiveness of bacterial treatment are provided. Limitations of current studies, updated applications and future application perspectives are shortly outlined.
authors.affiliation: Magnel Laboratory for Concrete Research, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 904, 9052, Ghent, Belgium.|Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, 9000, Ghent, Belgium.
authors.forename: Jianyun
authors.initials: J
authors.lastname: Wang
authors.affiliation: Magnel Laboratory for Concrete Research, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 904, 9052, Ghent, Belgium.|Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, 9000, Ghent, Belgium.
authors.forename: Yusuf Cagatay
authors.initials: YC
authors.lastname: Ersan
authors.affiliation: Laboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure Links 653, 9000, Ghent, Belgium.
authors.forename: Nico
authors.initials: N
authors.lastname: Boon
authors.affiliation: Magnel Laboratory for Concrete Research, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 904, 9052, Ghent, Belgium. Nele.DeBelie@Ugent.be.
authors.forename: Nele
authors.initials: N
authors.lastname: De Belie
mesh_terms: D001407:Bacillus / Q000737:chemistry / Q000378:metabolism*; D001410:Bacillus megaterium / Q000737:chemistry / Q000378:metabolism*; D002119:Calcium Carbonate / Q000737:chemistry* / Q000378:metabolism; D011232:Chemical Precipitation; D003252:Construction Materials / Q000382:microbiology*; D006244:Hardness; D008422:Materials Testing; D053858:Metabolic Networks and Pathways / Q000502:physiology; D058644:Sporosarcina / Q000737:chemistry / Q000378:metabolism*; D013499:Surface Properties
chemical_list: D002119:Calcium Carbonate
keywords: Bacteria; Bacterial-induced CaCO3 precipitation; Crack repair; Self-healing; Surface protection