Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
Self-healing Concrete Technology Utilizing Bacteria
K. Ryu
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2021 Volume 59 Issue 11 Pages 933-937

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Abstract

This paper introduces a self-healing technology for cracks in concrete that was developed for the purpose of ensuring durability and extending the service life of concrete structures through the metabolic activities of bacteria. This technology mixes in a self-healing material composed of a special strain of the Bacillus genus and polylactic acid, which is a source of food for these bacteria, during the production of concrete. When cracks occur in the concrete after hardening, the bacteria decompose the polylactic acid, causing the precipitation of calcium carbonate, which can close cracks up to 1 mm wide. The sustainability effect of this technology was evaluated from three aspects: social, economic, and environmental. As a result, it was found that products based on this technology can greatly contribute to the creation of a sustainable society as construction materials for infrastructure and buildings.

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© 2021 Japan Concrete Institute
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