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Bacteria strengthen homes

A group of scientists, including Russian ones, presented concrete, which included regenerating bacteria: when cracks appear in a building, the bacteria produce calcium carbonate in response to the appearance of moisture and oxygen in the cracks, and the crack is completely filled - they go into hibernation due to uncomfortable living conditions.With the help of carbonate, scientists plan to increase the real service life of concrete buildings from 20 to 80 years.
Approximately the same effect can be achieved by using special enzymes in the composition of concrete: when a crack appears in the building, carbonic anhydrases react to carbon dioxide and begin to produce calcium carbonate crystals, the strength of which is comparable to concrete.
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