“A bacteria that can knit together cracks in concrete structures by producing a special ‘glue’ has been developed by a team of students at Newcastle University. The genetically-modified microbe has been programmed to swim down fine cracks in the concrete. Once at the bottom it produces a mixture of calcium carbonate and a bacterial glue which combine with the filamentous bacterial cells to ‘knit’ the building back together. Ultimately hardening to the same strength as the surrounding concrete, the ‘BacillaFilla’ – as it has been aptly named – has been developed to prolong the life of structures which are environmentally costly to build.” Read more at
http://www.ncl.ac.uk/press.office/press.release/item/cracks-in-your-concrete-you-need-bacillafilla