Self-Healing Microbial Concrete - A Review

Abstract:

The cracks naturally exist in concrete and make it weak to the deleterious environment, ending with structure degradation. According to this fact, concrete requires to be improved and remediated. Self-healing methods are considered as a helpful way to mitigate the propagation and development of the cracks in the concrete. Bio-mineralization methods can heal the concrete by using bacteria suchlike Bacillus subtilis and Bacillus pasteurii, which can seal the cracks by CaCO3 precipitation. The literature represents the MICP method of using bacteria in concrete, which can improve the concrete durability by increasing the compressive strength. Furthermore, the different kinds of bacteria used in the concrete structure and the methods of employing as a self-healing agent review. Moreover, it illustrates B. Pasteurii and B. Sphaericus has more efficient results between other bacteria due to increasing the compressive strength and lifespan of the concrete.

• Periodical: Materials Science Forum (Volume 990)
• Pages: 8-12
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.990.8
• Online since: May 2020
• Authors: Sasan Farhadi*, Shervin Ziadloo
• Keywords: B. Pasteurii, B. Subtilis, Compressive Strength, Concrete, Self-Healing

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