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- Michael G. Gomez
- Department of Civil and Environmental Engineering, University of California: Davis, Davis, CA, USA
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- Brian C. Martinez
- Geosyntec Consultants, Oakland, CA, USA
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- Jason T. DeJong
- Department of Civil and Environmental Engineering, University of California: Davis, Davis, CA, USA
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- Chris E. Hunt
- Geosyntec Consultants, Oakland, CA, USA
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- Len A. deVlaming
- Geosyntec Consultants, Guelph, ON, Canada
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- David W. Major
- Geosyntec Consultants, Guelph, ON, Canada
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- Sandra M. Dworatzek
- SiREM Laboratories, Guelph, ON, Canada
書誌事項
- 公開日
- 2015-08
- DOI
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- 10.1680/grim.13.00052
- 公開者
- Emerald
この論文をさがす
説明
<jats:p> Microbially induced calcite precipitation (MICP) is a bio-mediated cementation process that improves the geotechnical properties of soils through the precipitation of calcite at soil particle contacts. This study presents a field-scale, surficial application of MICP to improve the erosion resistance of loose sand deposits and provide surface stabilisation for dust control and future re-vegetation. Three test plots were treated with a bacterial culture and nutrient solutions at varying concentrations, and a fourth test plot served as a control. Improvement was assessed to a depth of 40 cm using dynamic cone penetration (DCP) testing and calcite content measurements. The most improved test plot received the lowest concentrations of urea and calcium chloride and developed a stiff crust measuring 2·5 cm thick, which exhibited increased resistance to erosion. DCP testing and calcite content measurements indicated improvement to a depth of approximately 28 cm near the targeted depth of 30 cm. The results suggest that further optimisation of solutions and techniques could render MICP viable for larger-scale applications. </jats:p>
収録刊行物
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- Proceedings of the Institution of Civil Engineers - Ground Improvement
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Proceedings of the Institution of Civil Engineers - Ground Improvement 168 (3), 206-216, 2015-08
Emerald
