Microbial healing of cracks in concrete: a review
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Â© 2017, Society for Industrial Microbiology and Biotechnology. Concrete is the most widely used construction material of the world and maintaining concrete structures from premature deterioration is proving to be a great challenge. Early age formation of micro-cracking in concrete structure severely affects the serviceability leading to high cost of maintenance. Apart from conventional methods of repairing cracks with sealants or treating the concrete with adhesive chemicals to prevent the cracks from widening, a microbial crack-healing approach has shown promising results. The unique feature of the microbial system is that it enables self-healing of concrete. The effectiveness of microbially induced calcium carbonate precipitation (MICCP) in improving durability of cementitious building materials, restoration of stone monuments and soil bioclogging is discussed. Main emphasis has been laid on the potential of bacteria-based crack repair in concrete structure and the applications of different bacterial treatments to self-healing cracks. Furthermore, recommendations to employ the MICCP technology at commercial scale and reduction in the cost of application are provided in this review.
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Shaikh, Faiz (2018)© 2018, The Author(s). It is generally recognized that cracks provide easy access to ingress of chlorides in concrete and hence, the initiation of corrosion of steel in cracked concrete occurs at early stage. However, ...
Mohd Sam, A.; Ariffin, N.; Hussin, M.; Lee, H.; Ismail, Mohamed; Abdul Shukor Lim, N.; Khalid, N.; Samadi, M.; Mirza, J.; Majid, M. (2015)© 2015 Penerbit UTM Press. All rights reserved. Formation of cracks due to the shrinkage effects during curing and mechanical loading can deteriorate the concrete performance especially in terms of durability aspect. ...
Achal, V.; Mukherjee, Abhijit; Reddy, M. (2013)Microbially induced calcium carbonate precipitation is a naturally occurring biological process that has various applications in remediation and restoration of range of building materials. In the present study the role ...