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Article: Aragonite formation induced by open cultures of microbial consortia to heal cracks in concrete: Insights into healing mechanisms and crystal polymorphs
Title | Aragonite formation induced by open cultures of microbial consortia to heal cracks in concrete: Insights into healing mechanisms and crystal polymorphs |
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Authors | |
Keywords | Aragonite Calcite Economic evaluation Microbial consortia Self-healing concrete |
Issue Date | 2019 |
Citation | Construction and Building Materials, 2019, v. 224, p. 815-822 How to Cite? |
Abstract | Microbially induced CaCO3 precipitation (MICP), mainly in the form of calcite, has been reported to be an efficient approach for self-healing cracks in concrete. However, little is known about the implementation of aragonite, the other common crystalline form of CaCO3, in bioconcrete. Therefore, a systematic investigation of the crystal polymorphs and the healing efficiency of different cultures, i.e., two microbial consortia under anaerobic (MC-Aa) and anoxic (MC-Ao) conditions and nonureolytic pure-culture bacteria (Bacillus cohnii), was conducted in this study. The results showed that the MC-Ao agent exhibited the maximum values of completely healed crack widths (1.22 mm) after 28 d of healing, which is larger than the values of 0.79 and 0.73 mm for B. cohnii and MC-Aa, respectively. Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) analyses confirmed that the biominerals induced by MC-Aa and B. cohnii are calcite, while those of MC-Ao were 82% aragonite and 18% calcite. It is noteworthy that this proportion of aragonite is the highest reported level for the MICP system to date. In addition, economic evaluation verified that the microbial consortia resulted in a 61% decrease in production costs compared to pure cultures. The intriguing findings obtained in this study may provide a scientific basis for the potential implementation of microbial consortia under anoxic conditions, such as a new self-healing agent, in bioconcrete. |
Persistent Identifier | http://hdl.handle.net/10722/327530 |
ISSN | 2021 Impact Factor: 7.693 2020 SCImago Journal Rankings: 1.662 |
DC Field | Value | Language |
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dc.contributor.author | Zhang, Jiaguang | - |
dc.contributor.author | Zhao, C. | - |
dc.contributor.author | Zhou, Aijuan | - |
dc.contributor.author | Yang, Chao | - |
dc.contributor.author | Zhao, Lin | - |
dc.contributor.author | Li, Zhu | - |
dc.date.accessioned | 2023-03-31T05:32:01Z | - |
dc.date.available | 2023-03-31T05:32:01Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Construction and Building Materials, 2019, v. 224, p. 815-822 | - |
dc.identifier.issn | 0950-0618 | - |
dc.identifier.uri | http://hdl.handle.net/10722/327530 | - |
dc.description.abstract | Microbially induced CaCO3 precipitation (MICP), mainly in the form of calcite, has been reported to be an efficient approach for self-healing cracks in concrete. However, little is known about the implementation of aragonite, the other common crystalline form of CaCO3, in bioconcrete. Therefore, a systematic investigation of the crystal polymorphs and the healing efficiency of different cultures, i.e., two microbial consortia under anaerobic (MC-Aa) and anoxic (MC-Ao) conditions and nonureolytic pure-culture bacteria (Bacillus cohnii), was conducted in this study. The results showed that the MC-Ao agent exhibited the maximum values of completely healed crack widths (1.22 mm) after 28 d of healing, which is larger than the values of 0.79 and 0.73 mm for B. cohnii and MC-Aa, respectively. Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) analyses confirmed that the biominerals induced by MC-Aa and B. cohnii are calcite, while those of MC-Ao were 82% aragonite and 18% calcite. It is noteworthy that this proportion of aragonite is the highest reported level for the MICP system to date. In addition, economic evaluation verified that the microbial consortia resulted in a 61% decrease in production costs compared to pure cultures. The intriguing findings obtained in this study may provide a scientific basis for the potential implementation of microbial consortia under anoxic conditions, such as a new self-healing agent, in bioconcrete. | - |
dc.language | eng | - |
dc.relation.ispartof | Construction and Building Materials | - |
dc.subject | Aragonite | - |
dc.subject | Calcite | - |
dc.subject | Economic evaluation | - |
dc.subject | Microbial consortia | - |
dc.subject | Self-healing concrete | - |
dc.title | Aragonite formation induced by open cultures of microbial consortia to heal cracks in concrete: Insights into healing mechanisms and crystal polymorphs | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.conbuildmat.2019.07.129 | - |
dc.identifier.scopus | eid_2-s2.0-85069562116 | - |
dc.identifier.volume | 224 | - |
dc.identifier.spage | 815 | - |
dc.identifier.epage | 822 | - |