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Title |
A Study on the Development of Self-Healing Smart Concrete Using Microbial Biomineralization
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Authors |
김화중 ; 김성태 ; 박성진 ; 김사열 ; 천우영 |
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Keywords |
콘크리트 균열 ; 미생물 ; 생체광물형성작용 ; 방해석(탄산칼슘) ; 자기치유 concrete crack ; micro-organism ; biomineralization ; calcite(CaCO3) ; self-healing |
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Abstract |
This study was conducted to develop self-healing ability of concrete so that inspection could be available even in the event of minute cracks without complex works at any time for more economic concrete structure maintenance and longevity. A completely different method has been carried out in comparison with many of similar researches on self-healing concrete. This is a basic study on the development of self-healing concrete using microbial biomineralization. Compounds were generated except for cells by precipitation reaction of CaCO3 during the microbial metabolism and we examined the use as a binder that hardens the surface of sand using biomineralization that Sporosarcina pasteurii precipitates CaCO3. In result, the formation of new mineral and hardening of sand surface could be verified partly, and it was available for cracks to be repaired by calcite with organic (microorganism) and inorganic (CaCO3) complex structure through the basic experiment a little bit. Therefore the use of biomineralization by this sort of microbial metabolism for concrete structure helps to develop absolute repair-concrete like this concrete with microorganism. The effect of microbial application will be one of the most important research tasks having influence on not only repair for concrete structure but also development of new materials able to reduce environmental problems.
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