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Electrokinetic Stabilization of Soft Soil Using Carbonate-Producing Bacteria

Keykha, Hamed A. / Huat, Bujang B. K. / Asadi, Afshin

Abstract The carbonate (CO3−2) produced by Sporosarcina pasteurii was injected electrokinetically to enhance the mechanical properties of soft clay soils. In this method the $ Ca^{2+} $ was injected into the anode chamber and moved towards the cathode by electromigration and electroosmotic flow. Then the released CO3−2 from a blend of bacteria and urea was injected into the cathode chamber. The CO3−2 ions were moved from the cathode to the anode under electromigration mechanism. The $ CaCO_{3} $ was precipitated in the presence of calcium in porous medium of the soil, and consequently increased the shear strength of the soil. The polarity reversal was applied to have a homogeneous distribution of $ CaCO_{3} $.

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Electrokinetic Stabilization of Soft Soil Using Carbonate-Producing Bacteria

Keykha, Hamed A. / Huat, Bujang B. K. / Asadi, Afshin

Abstract The carbonate (CO3−2) produced by Sporosarcina pasteurii was injected electrokinetically to enhance the mechanical properties of soft clay soils. In this method the $ Ca^{2+} $ was injected into the anode chamber and moved towards the cathode by electromigration and electroosmotic flow. Then the released CO3−2 from a blend of bacteria and urea was injected into the cathode chamber. The CO3−2 ions were moved from the cathode to the anode under electromigration mechanism. The $ CaCO_{3} $ was precipitated in the presence of calcium in porous medium of the soil, and consequently increased the shear strength of the soil. The polarity reversal was applied to have a homogeneous distribution of $ CaCO_{3} $.

Electrokinetic Stabilization of Soft Soil Using Carbonate-Producing Bacteria

Keykha, Hamed A. / Huat, Bujang B. K. / Asadi, Afshin

Abstract The carbonate (CO3−2) produced by Sporosarcina pasteurii was injected electrokinetically to enhance the mechanical properties of soft clay soils. In this method the $ Ca^{2+} $ was injected into the anode chamber and moved towards the cathode by electromigration and electroosmotic flow. Then the released CO3−2 from a blend of bacteria and urea was injected into the cathode chamber. The CO3−2 ions were moved from the cathode to the anode under electromigration mechanism. The $ CaCO_{3} $ was precipitated in the presence of calcium in porous medium of the soil, and consequently increased the shear strength of the soil. The polarity reversal was applied to have a homogeneous distribution of $ CaCO_{3} $.

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Title:

Electrokinetic Stabilization of Soft Soil Using Carbonate-Producing Bacteria

Contributors:

Keykha, Hamed A. (author) / Huat, Bujang B. K. (author) / Asadi, Afshin (author)

Published in:

Geotechnical and Geological Engineering ; 32

Publication date:

2014

ISSN:

DOI:

https://doi.org/10.1007/s10706-014-9753-8

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Biogrouting , Electrophoresis mobility , Electrokinetic , Electromigration , Microbial induced carbonate precipitation (MICP) , Biocement , Electroosmotic flow

Classification:

BKL: 38.58 Geomechanik / 57.00 Bergbau: Allgemeines / 56.20 Ingenieurgeologie, Bodenmechanik
Local classification TIB: 275/3750

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