Biopolymer-biocement composite treatment for stabilisation of soil against both current and wave erosion
Increased frequency of extreme weather events has made the conservation of riverbanks and coastlines a global concern. Soil stabilisation via microbially induced calcite precipitation (MICP) is one of the most eco-suitable candidates for improving resilience against erosion. In this study, the erosi...
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| Format: | Journal Article |
| Language: | English |
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SPRINGER HEIDELBERG
2022
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| Online Access: | http://purl.org/au-research/grants/arc/LP180100132 http://hdl.handle.net/20.500.11937/90915 |
| _version_ | 1848765459466289152 |
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| author | Dubey, Anant Aishwarya Hooper-Lewis, Jack Ravi, K. Dhami, Navdeep Kaur Mukherjee, Abhijit |
| author_facet | Dubey, Anant Aishwarya Hooper-Lewis, Jack Ravi, K. Dhami, Navdeep Kaur Mukherjee, Abhijit |
| author_sort | Dubey, Anant Aishwarya |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Increased frequency of extreme weather events has made the conservation of riverbanks and coastlines a global concern. Soil stabilisation via microbially induced calcite precipitation (MICP) is one of the most eco-suitable candidates for improving resilience against erosion. In this study, the erosion characteristics of soil treated with various levels of biocementation are investigated. The samples were subjected to hydraulic flow in both tangential and perpendicular directions in a flume to simulate riverbank and coastal situations. Soil mass loss, eroded volume, and cumulative erosion rates of the treated soil against the applied hydraulic energy density have been reported. Post erosion exposure, the residual soil has been assessed for its properties using needle penetration resistance, precipitated calcium carbonate content and microstructure. It was observed that soil erosion declined exponentially with the increase in calcium carbonate content against the perpendicular waves. However, biocementation leads to brittle fracture beyond a threshold, limiting its efficacy, especially against the tangential waves. Additional composite treatment with a biopolymer was found to improve the resilience of the soil specimens against erosion. The composite treatment required half of the quantity of the biocementing reagents in comparison to the equally erosion-resistant plain biocemented sample. Therefore, stoichiometrically the composite treatment is likely to yield 50% lesser ammonia than plain biocement treatment. This investigation unravels a promising soil conservation technique via the composite effect of biocement and biopolymer. |
| first_indexed | 2025-11-14T11:35:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-90915 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:35:35Z |
| publishDate | 2022 |
| publisher | SPRINGER HEIDELBERG |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-909152023-05-11T03:53:37Z Biopolymer-biocement composite treatment for stabilisation of soil against both current and wave erosion Dubey, Anant Aishwarya Hooper-Lewis, Jack Ravi, K. Dhami, Navdeep Kaur Mukherjee, Abhijit Science & Technology Technology Engineering, Geological Engineering Biocementation Biopolymers Coastal erosion Microbial induced calcite precipitation (MICP) Riverbank erosion INDUCED CALCITE PRECIPITATION SAND MICP Increased frequency of extreme weather events has made the conservation of riverbanks and coastlines a global concern. Soil stabilisation via microbially induced calcite precipitation (MICP) is one of the most eco-suitable candidates for improving resilience against erosion. In this study, the erosion characteristics of soil treated with various levels of biocementation are investigated. The samples were subjected to hydraulic flow in both tangential and perpendicular directions in a flume to simulate riverbank and coastal situations. Soil mass loss, eroded volume, and cumulative erosion rates of the treated soil against the applied hydraulic energy density have been reported. Post erosion exposure, the residual soil has been assessed for its properties using needle penetration resistance, precipitated calcium carbonate content and microstructure. It was observed that soil erosion declined exponentially with the increase in calcium carbonate content against the perpendicular waves. However, biocementation leads to brittle fracture beyond a threshold, limiting its efficacy, especially against the tangential waves. Additional composite treatment with a biopolymer was found to improve the resilience of the soil specimens against erosion. The composite treatment required half of the quantity of the biocementing reagents in comparison to the equally erosion-resistant plain biocemented sample. Therefore, stoichiometrically the composite treatment is likely to yield 50% lesser ammonia than plain biocement treatment. This investigation unravels a promising soil conservation technique via the composite effect of biocement and biopolymer. 2022 Journal Article http://hdl.handle.net/20.500.11937/90915 10.1007/s11440-022-01536-2 English http://purl.org/au-research/grants/arc/LP180100132 http://creativecommons.org/licenses/by/4.0/ SPRINGER HEIDELBERG fulltext |
| spellingShingle | Science & Technology Technology Engineering, Geological Engineering Biocementation Biopolymers Coastal erosion Microbial induced calcite precipitation (MICP) Riverbank erosion INDUCED CALCITE PRECIPITATION SAND MICP Dubey, Anant Aishwarya Hooper-Lewis, Jack Ravi, K. Dhami, Navdeep Kaur Mukherjee, Abhijit Biopolymer-biocement composite treatment for stabilisation of soil against both current and wave erosion |
| title | Biopolymer-biocement composite treatment for stabilisation of soil against both current and wave erosion |
| title_full | Biopolymer-biocement composite treatment for stabilisation of soil against both current and wave erosion |
| title_fullStr | Biopolymer-biocement composite treatment for stabilisation of soil against both current and wave erosion |
| title_full_unstemmed | Biopolymer-biocement composite treatment for stabilisation of soil against both current and wave erosion |
| title_short | Biopolymer-biocement composite treatment for stabilisation of soil against both current and wave erosion |
| title_sort | biopolymer-biocement composite treatment for stabilisation of soil against both current and wave erosion |
| topic | Science & Technology Technology Engineering, Geological Engineering Biocementation Biopolymers Coastal erosion Microbial induced calcite precipitation (MICP) Riverbank erosion INDUCED CALCITE PRECIPITATION SAND MICP |
| url | http://purl.org/au-research/grants/arc/LP180100132 http://hdl.handle.net/20.500.11937/90915 |