Researchers from the University of Newcastle (UK), led by Jennifer Hollinan developed a new type of glue that can patch the cracks in concrete structures and to help the speedy restoration of buildings damaged, for example, as a result of seismic hazards, according to the publication TechNewsDaily.
But the glue that is not really the glue that is not some sort of synthetic material, a bacterium specifically bred to penetrate deep into the cracks and replace him putty.
BacillaFilla, as researchers call it, is nothing more than a genetically modified Bacillus subtilis (Bacillus subtilis) — ubiquitous soil bacterium. Its genetic properties are selected in such a way that it begins to divide, only making contact with the concrete, having a certain pH value of pH. Once the bacteria realize that their accumulated enough, start creating bacterial filaments in which microorganisms are differentiated into three types. Some produce calcium carbonate crystals, others — special adhesive, while others act as reinforcing fibers.
Bacteria are also equipped with self-destruct gene that does not allow them to multiply enough to go beyond the target crack. Very nice of them.
The researchers emphasize that the construction of new buildings is costly in terms of ecology. According to them, about 5% of the total carbon dioxide emissions from human activities have on the production of cement. Extend the life of the already constructed buildings could significantly reduce human contribution to global warming.