Alan Richardson, a scientist from the University of Northumbria in the United Kingdom proposed to use for calcite (a crystalline form of natural calcium carbonate) bacteria Bacilli megaterium. This material can be used for blocking pores of concrete that will keep the concrete from damage by water or any other substances.
Scientific cultivated bacteria broth of yeast, urea and minerals and then add them to the concrete. Concrete is a bacteria food source, they are actively therein multiply and spread, forming increasingly calcite acting as a sealant. Calcite fills all the cracks in the concrete and seals them, preventing the destruction of concrete structures.
Of course, in the future, "netreskayuschiysya" concrete awaits many tests and experiments, but Alan Richardson is confident that his brainchild easily passes all the tests. He created the concrete resistant to external factors, and costs no more than usual. Furthermore, self-healing concrete is today the only way to combat the so-called "concrete cancer" arising from the penetration of water into the pores of the concrete, which leads to swelling and disintegration of the material. A mortar with a wonder-bacteria in the structure will also be very useful in the recovery of existing objects in concrete.
Materials used: Sciencemagic.ru