Bio-cementation of sandy soil using microbially induced carbonate precipitation for marine environments
This study proposes and describes a novel approach for cementing sandy soils in marine environments by modifying the promising technique of microbially induced carbonate precipitation (MICP). In contrast to the usual MICP technique described in the literature, the method proposed herein relies on th...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Published: |
I C E Publishing
2014
|
| Online Access: | http://hdl.handle.net/20.500.11937/43106 |
| _version_ | 1848756599495065600 |
|---|---|
| author | Cheng, Liang Shahin, Mohamed Cord-Ruwisch, R. |
| author_facet | Cheng, Liang Shahin, Mohamed Cord-Ruwisch, R. |
| author_sort | Cheng, Liang |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study proposes and describes a novel approach for cementing sandy soils in marine environments by modifying the promising technique of microbially induced carbonate precipitation (MICP). In contrast to the usual MICP technique described in the literature, the method proposed herein relies on the calcium ions dissolved in seawater as the sole source of calcium for calcite formation. This proposed method involves flushing high-salinity-tolerant, urease-active bacteria followed by a mixture of urea and seawater through a porous sandy soil, leading to bacterial carbonate release from the urease reaction and precipitation of insoluble and semi-soluble carbonate salts including calcium carbonate and magnesium carbonate trihydrate. This precipitation method resulted in a physical stabilisation of sand that reached an unconfined compressive strength of up to 300 kPa, which is about two-fold higher (with same amount of crystals produced) than that of the MICP treatment in which highly concentrated calcium and urea solutions are used. Permeability was retained at about 30% for all MICP-treated samples, suggesting good drainage ability. This new exploration of MICP technology provides a high potential for using bio-cementation in marine environments, for applications such as mitigation of submarine sediment liquefaction and prevention of beach sand erosion and cliffs scouring. |
| first_indexed | 2025-11-14T09:14:46Z |
| format | Journal Article |
| id | curtin-20.500.11937-43106 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:14:46Z |
| publishDate | 2014 |
| publisher | I C E Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-431062017-09-13T15:55:53Z Bio-cementation of sandy soil using microbially induced carbonate precipitation for marine environments Cheng, Liang Shahin, Mohamed Cord-Ruwisch, R. This study proposes and describes a novel approach for cementing sandy soils in marine environments by modifying the promising technique of microbially induced carbonate precipitation (MICP). In contrast to the usual MICP technique described in the literature, the method proposed herein relies on the calcium ions dissolved in seawater as the sole source of calcium for calcite formation. This proposed method involves flushing high-salinity-tolerant, urease-active bacteria followed by a mixture of urea and seawater through a porous sandy soil, leading to bacterial carbonate release from the urease reaction and precipitation of insoluble and semi-soluble carbonate salts including calcium carbonate and magnesium carbonate trihydrate. This precipitation method resulted in a physical stabilisation of sand that reached an unconfined compressive strength of up to 300 kPa, which is about two-fold higher (with same amount of crystals produced) than that of the MICP treatment in which highly concentrated calcium and urea solutions are used. Permeability was retained at about 30% for all MICP-treated samples, suggesting good drainage ability. This new exploration of MICP technology provides a high potential for using bio-cementation in marine environments, for applications such as mitigation of submarine sediment liquefaction and prevention of beach sand erosion and cliffs scouring. 2014 Journal Article http://hdl.handle.net/20.500.11937/43106 10.1680/geot.14.T.025 I C E Publishing fulltext |
| spellingShingle | Cheng, Liang Shahin, Mohamed Cord-Ruwisch, R. Bio-cementation of sandy soil using microbially induced carbonate precipitation for marine environments |
| title | Bio-cementation of sandy soil using microbially induced carbonate precipitation for marine environments |
| title_full | Bio-cementation of sandy soil using microbially induced carbonate precipitation for marine environments |
| title_fullStr | Bio-cementation of sandy soil using microbially induced carbonate precipitation for marine environments |
| title_full_unstemmed | Bio-cementation of sandy soil using microbially induced carbonate precipitation for marine environments |
| title_short | Bio-cementation of sandy soil using microbially induced carbonate precipitation for marine environments |
| title_sort | bio-cementation of sandy soil using microbially induced carbonate precipitation for marine environments |
| url | http://hdl.handle.net/20.500.11937/43106 |