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Title |
Investigation of Crack Healing and Optimization of Microbe Carrier for Microbial Self-healing of Concrete Crack
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DOI |
https://doi.org/10.11112/jksmi.2024.28.4.62 |
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Keywords |
자기치유 콘크리트; 생체광물형성작용; 탄산칼슘; 균열치유작용; 미생물; 내생포자 Self-healing concrete; Biomineralization; Calcium carbonate; Crack healing; Microorganism; Endospore |
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Abstract |
In this paper, we developed and optimized a chitosan-based polymer microbial bead carrier that is cell-friendly, has a high moisture absorption rate, and effectively provides the conditions for microbial biomineral formation as an optimal microbial carrier that protects microorganisms in concrete, and evaluated the self-healing performance of mortar using it. In order to incorporate circular-shaped microbial endospores, a circular-shaped microbial bead carrier was developed by combining chitosan and alginate polymers, and the amount of calcium carbonate produced could be actively controlled by adjusting the composition of the carrier. The amount of biominerals formed and the size of crystals were maximized in the hydrogel bead carrier containing chitosan, and in the case of mortar cracks using this, it was confirmed that self-healing of cracks with a maximum crack width of 0.3mm was achieved within 96 hours after crack generation.
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