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Title |
Development of Self-Repairing Smart Concrete Using Micro-Biologically Induced Calcite Precipitation
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Authors |
김화중 ; 김사열 ; 박성진 ; 최길준 ; 천우영 |
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Keywords |
콘크리트 균열 ; 미생물 ; 생체광물형성작용 ; 방해석(탄산칼슘) ; 자기보수 concrete crack ; micro-organism ; biomineralization ; calcite(CaCO3) ; self-repairing |
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Abstract |
This paper presents a study on the development of next generation smart concrete in an eco-friendly manner using micro-biologically induced calcite precipitation (MICP) via microbial biomineralization. It seems that currently, the reformation and functional improvement of concrete using MICP can be achieved using Sporosarcina pasteurii, which is a representative microorganism that produces calcite precipitation. Based on previous studies on MICP the biochemical tests and crystallinity evaluation of cement using sporoasrcina pasteurii and four additional micro-organisms from the concrete structures as identified by 16S rDNA sequence analysis were conducted. Also by applying the Sporosarcina pasteurii and separated four effective micro-organisms from the concrete structures to mortar, the compressive strength improvement by varying curing conditions, repair of crack were examined, and plans for future study were suggested. The effect of the application of effective micro-organisms can lead to the development of a new material that will contribute to resolution of environmental problems and facilitate repair work, and this can also serve as a new research theme in the future. In addition, the importance of this study is to use micro-organism, which is found common in concrete structures, this new microbial is not only environmentally safe but also persists in the natural environment for an extended period of time. Therefore, it seems to have a great potential to became a new environmentally low-burdened functional material.
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