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Effect of chemical treatment used in MICP on engineering properties of cemented soils
Abstract
Despite the large number of studies concerned with microbially induced carbonate precipitation (MICP) on soils, little attention has been paid to the effect of the chemical concentration used in the treatment on the precipitation pattern of calcium carbonate and their influence on engineering properties of MICP cemented soils. In this study, unconfined compressive strength tests were conducted on sand samples treated using 0·1, 0·25, 0·5 and 1 M urea–calcium chloride solutions. It was found that, although the strength of tested samples all increased after MICP treatment, the magnitude of this increase depended on the concentration used in the treatment and that the use of a low-chemical-concentration (i.e. urea and calcium chloride) solution resulted in stronger samples. Permeability test results showed that the use of a high-urea–calcium chloride-concentration solution resulted in a rapid drop in permeability at the early stage of calcite precipitation, whereas the use of a low-chemical-concentration solution was found to result in a more gradual and uniform decrease in permeability. This observed effect of chemical concentration on the strength and permeability of MICP cemented soils can have implications for the design of MICP for field applications.
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Cited by
Influence of cementation level on the strength behaviour of bio-cemented sand
Cui, M.-J., Zheng, J.-J., Zhang, R.-J., Lai, H.-J., & Zhang, J. (2017) · Acta Geotechnica · doi:10.1007/s11440-017-0574-9 · Cited by 389
Mechanical Behavior of Sands Treated by Microbially Induced Carbonate Precipitation
Lin, H., Suleiman, M. T., Brown, D. G., & Kavazanjian, E. (2016) · Journal of Geotechnical and Geoenvironmental Engineering · doi:10.1061/(asce)gt.1943-5606.0001383 · Cited by 332
The Mechanical Properties of Fly-Ash-Stabilized Sands
Simatupang, M., Mangalla, L. K., Edwin, R. S., Putra, A. A., Azikin, M. T., Aswad, N. H., & Mustika, W. (2020) · Geosciences · doi:10.3390/geosciences10040132 · Cited by 61
Metadata
- Authors
- QABANY, A. A., & SOGA, K.
- Venue
- Géotechnique
- Publisher
- Emerald
- Published
- 2013-03
- Volume
- 63
- Issue
- 4
- Pages
- 331-339
- ISSN
- 0016-8505 (ISSN-L)
- 1751-7656
- OpenAlex
- W2166264965
- Cited by
- 614
- References
- 0
- FWCI
- 9.81
- Type
- journal article
- Language
- en
- Open access
- closed
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- QABANY, A. A., & SOGA, K. (2013). Effect of chemical treatment used in MICP on engineering properties of cemented soils. Géotechnique. https://doi.org/10.1680/geot.sip13.p.022
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