Biologically Induced Self Healing Concrete: A Futuristic Solution for Crack Repair

  • Shivani Gupta Gupta Department of Biological Sciences, Birla Institute of Technology and Sciences (BITS Pilani), Hyderabad Campus, Hyderabad- 500078
  • Chhavi Rathi Department of Biological Sciences, Birla Institute of Technology and Sciences (BITS Pilani), Hyderabad Campus, Hyderabad- 500078
  • Suman Kapur Department of Biological Sciences, Birla Institute of Technology and Sciences (BITS Pilani), Hyderabad Campus, Hyderabad- 500078
Keywords: Concrete, Self-healing, Bio-mineralization, Biologically induced self-healing, Cracks

Abstract

Concrete is a mixture of cement, water, sand and other aggregates in adequate proportions. Its high tensile strength and ability to withstand a vast range of environmental changes makes it the first choice for construction material. One of the major problems associated with concrete is its permeability because penetration of gases and/or liquids from the surrounding environment into the concrete, followed by physical and/or chemical reactions within its internal structure/s leads to irreversible damages. Although cement has autonomous capacity to heal, however cracks <0.2mm width can only self-heal. Biomineralization is one of the best ecofriendly techniques to tackle the problem of cracks in concrete structures. Biologically induced self-healing is beneficial in addressing all the drawbacks of concrete matrix. The most promising technology for producing crack resistant/highly self healing concrete in near future seems to be “BacillaFilla”: genetically modified version of Bacillus subtilis, is a “custom –designed” bacteria to embed deep into the cracks in concrete where they produce a mix of calcium carbonate and a special bacteria glue that hardens to the same strength as of the surrounding concrete.

DOI: http://dx.doi.org/10.3126/ijasbt.v1i3.8582

Int J Appl Sci Biotechnol, Vol. 1(3) 2013 : 85-89

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Abstract
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Published
2013-09-25
How to Cite
Gupta, S. G., Rathi, C., & Kapur, S. (2013). Biologically Induced Self Healing Concrete: A Futuristic Solution for Crack Repair. International Journal of Applied Sciences and Biotechnology, 1(3), 85-89. https://doi.org/10.3126/ijasbt.v1i3.8582
Section
Mini Reviews