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Corrosion protection of cement-based building materials by surface deposition of CaCO3 by Bacillus pasteurii
Journal article   Peer reviewed

Corrosion protection of cement-based building materials by surface deposition of CaCO3 by Bacillus pasteurii

Q. Chunxiang, W. Jianyun, W. Ruixing and L. Cheng
Materials Science and Engineering: C, Vol.29(4), pp.1273-1280
2009
DOI: https://doi.org/10.1016/j.msec.2008.10.025
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Abstract

Bacterially induced calcium carbonate precipitation was used as a novel and environmentally friendly approach to produce a protective layer on the surface of cement-based materials in the study. The physical and chemical properties of the obtained layer were examined. X-ray diffraction analysis characterized the composition of the deposited layer and scanning electron microscopy displayed the morphology of particles. The results showed that both bacterial activity and the method of adding Ca2+ and urea had a profound effect on the properties of the calcium carbonate layer. A capillary water absorption test was carried out to evaluate the ability of the protective layer to improve the resistance to water penetration. Experimental results indicated that the calcium carbonate layer, obtained under the conditions of high bacterial activity, appropriate concentration of Ca2+, and adding Ca2+ before urea to the reaction mixture, could greatly improve the water penetration resistance of the specimen surface. This type of treatment has the potential to conserve and consolidate cement-based materials

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216 Times Cited - Web of Science

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Citation topics
7 Engineering & Materials Science
7.133 Geotechnical Engineering
7.133.2345 MICP
Web Of Science research areas
Materials Science, Multidisciplinary
ESI research areas
Materials Science
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