Effect of Chitosan Solution on Low-Cohesive Soil’s Shear Modulus <i>G</i> Determined through Resonant Column and Torsional Shearing Tests
In this study the effect of using a biopolymer soil stabilizer on soil stiffness characteristics was investigated. Chitosan is a bio-waste material that is obtained by chemical treatment of chitin (a chemical component of fungi or crustaceans’ shells). Using chitosan solution as a soil stabilizer is...
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MDPI AG
2022-05-01
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| author | Marta Bocheńska Marcin Bujko Ireneusz Dyka Piotr Srokosz Rafał Ossowski |
| author_facet | Marta Bocheńska Marcin Bujko Ireneusz Dyka Piotr Srokosz Rafał Ossowski |
| author_sort | Marta Bocheńska |
| collection | DOAJ |
| description | In this study the effect of using a biopolymer soil stabilizer on soil stiffness characteristics was investigated. Chitosan is a bio-waste material that is obtained by chemical treatment of chitin (a chemical component of fungi or crustaceans’ shells). Using chitosan solution as a soil stabilizer is based on the assumption that the biopolymer forms temporary bonds with soil particles. What is important is that these bonds are biodegradable, so the product does not leave any harmful waste and has high eco-compatibility. The biopolymer itself is a by-product of many industrial chemical processes, so its application is compliant with the goals of sustainable geotechnical engineering. The effect of chitosan on soil shear strength, permeability or surface erosion has already been investigated in several different studies. In this study specimens of low-cohesive soil stabilized with two different chitosan solutions were subject to cyclic loading (torsional shearing test) and dynamic loading (resonant column) to obtain soil shear modulus <i>G</i> as a function of strain values. It has been shown that chitosan solution added to medium-grained materials improves their shear modulus <i>G</i> substantially (up to 3 times) even for relatively low chitosan concentration solutions (1.5 g of chitosan per 1 kg of dry silica sand). The results obtained in this study and the known chitosan properties suggest that chitosan solutions can be a very effective and eco-friendly short-term stabilizer for temporary geotechnical structures, e.g., working platforms. |
| first_indexed | 2024-03-10T01:32:50Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T01:32:50Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-a9a76850872740e896375885274cc6252023-11-23T13:39:55ZengMDPI AGApplied Sciences2076-34172022-05-011211533210.3390/app12115332Effect of Chitosan Solution on Low-Cohesive Soil’s Shear Modulus <i>G</i> Determined through Resonant Column and Torsional Shearing TestsMarta Bocheńska0Marcin Bujko1Ireneusz Dyka2Piotr Srokosz3Rafał Ossowski4Faculty of Geoengineering, University of Warmia and Mazury, 10-957 Olsztyn, PolandFaculty of Geoengineering, University of Warmia and Mazury, 10-957 Olsztyn, PolandFaculty of Geoengineering, University of Warmia and Mazury, 10-957 Olsztyn, PolandFaculty of Geoengineering, University of Warmia and Mazury, 10-957 Olsztyn, PolandFaculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, PolandIn this study the effect of using a biopolymer soil stabilizer on soil stiffness characteristics was investigated. Chitosan is a bio-waste material that is obtained by chemical treatment of chitin (a chemical component of fungi or crustaceans’ shells). Using chitosan solution as a soil stabilizer is based on the assumption that the biopolymer forms temporary bonds with soil particles. What is important is that these bonds are biodegradable, so the product does not leave any harmful waste and has high eco-compatibility. The biopolymer itself is a by-product of many industrial chemical processes, so its application is compliant with the goals of sustainable geotechnical engineering. The effect of chitosan on soil shear strength, permeability or surface erosion has already been investigated in several different studies. In this study specimens of low-cohesive soil stabilized with two different chitosan solutions were subject to cyclic loading (torsional shearing test) and dynamic loading (resonant column) to obtain soil shear modulus <i>G</i> as a function of strain values. It has been shown that chitosan solution added to medium-grained materials improves their shear modulus <i>G</i> substantially (up to 3 times) even for relatively low chitosan concentration solutions (1.5 g of chitosan per 1 kg of dry silica sand). The results obtained in this study and the known chitosan properties suggest that chitosan solutions can be a very effective and eco-friendly short-term stabilizer for temporary geotechnical structures, e.g., working platforms.https://www.mdpi.com/2076-3417/12/11/5332soil stabilizationchitosannon-traditional additivessoil shear modulustemporary geotechnical structures |
| spellingShingle | Marta Bocheńska Marcin Bujko Ireneusz Dyka Piotr Srokosz Rafał Ossowski Effect of Chitosan Solution on Low-Cohesive Soil’s Shear Modulus <i>G</i> Determined through Resonant Column and Torsional Shearing Tests Applied Sciences soil stabilization chitosan non-traditional additives soil shear modulus temporary geotechnical structures |
| title | Effect of Chitosan Solution on Low-Cohesive Soil’s Shear Modulus <i>G</i> Determined through Resonant Column and Torsional Shearing Tests |
| title_full | Effect of Chitosan Solution on Low-Cohesive Soil’s Shear Modulus <i>G</i> Determined through Resonant Column and Torsional Shearing Tests |
| title_fullStr | Effect of Chitosan Solution on Low-Cohesive Soil’s Shear Modulus <i>G</i> Determined through Resonant Column and Torsional Shearing Tests |
| title_full_unstemmed | Effect of Chitosan Solution on Low-Cohesive Soil’s Shear Modulus <i>G</i> Determined through Resonant Column and Torsional Shearing Tests |
| title_short | Effect of Chitosan Solution on Low-Cohesive Soil’s Shear Modulus <i>G</i> Determined through Resonant Column and Torsional Shearing Tests |
| title_sort | effect of chitosan solution on low cohesive soil s shear modulus i g i determined through resonant column and torsional shearing tests |
| topic | soil stabilization chitosan non-traditional additives soil shear modulus temporary geotechnical structures |
| url | https://www.mdpi.com/2076-3417/12/11/5332 |
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