Tiny cracks that form in concrete may not pose an immediate problem to
To solve the problem, scientists were inspired by the workhuman body; namely by the work of an enzyme in red blood cells called carbonic anhydrase. It is able to rapidly transfer CO₂ from cells to the bloodstream.
The team added the enzyme to the concrete powder beforemixing and pouring material. The experiment showed that when a small crack forms in concrete, carbonic anhydrase interacts with CO₂ in the air. As a result, calcium carbonate crystals are formed, which mimic the characteristics of concrete and quickly fill the crack in the structure.
In tests, scientists have demonstrated that their alloyed concrete repairs millimeter-sized cracks in 24 hours.
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