Use of bacteria to repair cracks in concrete

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Development of Engineered Self-Healing and Self-Repairing Concrete-State-of-the-Art Report (2012, methodology): “Van Tittelboom et al. (2010) investigated the use of a biological repair technique in which ureolytic bacteria are able to precipitate CaCO3 in their micro-environment by conversion of urea into ammonium and carbonate.”
Modification of recycled concrete aggregate by calcium carbonate biodeposition (2012, background): “acetate and nitrate) could be possible to apply in practice and be safer for reinforced concrete structures [13].”
Smart releasing behavior of a chemical self-healing microcapsule in the stimulated concrete pore solution (2015, background): “In addition to the further improvement of this novel approach for the crack repairing and mechanical performance recovery, its attention has been turned to the recovery of degradations induced by reinforcement corrosion, which is generally regarded as the major threatening in marine environments [14”