Modifying behavior of calcined waste phosphorus slag on the dispersivity and mechanical properties of dispersive soil
Dispersive soil is a common problem soil in engineering projects, which has the potential risk of causing serious engineering failures. In this paper, calcined waste phosphorus slag (CPS) was chosen to enhance the mechanical properties and reduce soil dispersivity. Dispersive soil samples with 1 % t...
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Elsevier
2024-12-01
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| Series: | Soils and Foundations |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0038080624001021 |
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| author | Gaowen Zhao Tao Wu Guanzhou Ren Dongyang Yan Zhen Zhu Shijun Ding Mei Shi Henghui Fan |
| author_facet | Gaowen Zhao Tao Wu Guanzhou Ren Dongyang Yan Zhen Zhu Shijun Ding Mei Shi Henghui Fan |
| author_sort | Gaowen Zhao |
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| description | Dispersive soil is a common problem soil in engineering projects, which has the potential risk of causing serious engineering failures. In this paper, calcined waste phosphorus slag (CPS) was chosen to enhance the mechanical properties and reduce soil dispersivity. Dispersive soil samples with 1 % to 10 % CPS content were prepared and cured for 0 to 28 days. The dispersivity identification test was used to assess soil sample dispersivity. The compressive and tensile strength, conductivity, and pH were determined for the soil. Microstructural and mineral composition were analyzed using SEM/EDS, TG/DTG, and XRD analysis. The natural dispersive soil was selected to verify the effect of CPS in improving soil. Experiments show that the CPS inhibits soil dispersivity and converts it into non-dispersive soil. Both compressive and tensile strength increases significantly with the increase in the content of CPS and curing time. The tensile strength of the soil samples cured for 28 days increased by about 76 % and the compressive strength by about 61 % as the mixed content of CPS was increased from 1 % to 10 %. Results show that CPS can improve the strength and modify the dispersivity of soil, its optimal mixing content is 5 %. In addition, using CPS in dispersive soil could also solve the disposal problem of phosphate slag, which is a win-to-win solution. |
| format | Article |
| id | doaj-art-c525fa9861324e1a9805ccb51bbf669a |
| institution | OA Journals |
| issn | 2524-1788 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Soils and Foundations |
| spelling | doaj-art-c525fa9861324e1a9805ccb51bbf669a2025-08-20T01:56:46ZengElsevierSoils and Foundations2524-17882024-12-0164610152410.1016/j.sandf.2024.101524Modifying behavior of calcined waste phosphorus slag on the dispersivity and mechanical properties of dispersive soilGaowen Zhao0Tao Wu1Guanzhou Ren2Dongyang Yan3Zhen Zhu4Shijun Ding5Mei Shi6Henghui Fan7School of Highway, Chang’an University, Xi’an 710064, China; Key Laboratory for Special Area Highway Engineering, Ministry of Education, Chang’an University, Xi’an, China; Corresponding author at: School of Highway, Chang’an University, Xi’an 710064, China.School of Highway, Chang’an University, Xi’an 710064, China; Key Laboratory for Special Area Highway Engineering, Ministry of Education, Chang’an University, Xi’an, ChinaCollege of Water Conservancy and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaSchool of Highway, Chang’an University, Xi’an 710064, China; Key Laboratory for Special Area Highway Engineering, Ministry of Education, Chang’an University, Xi’an, ChinaCollege of Water Conservancy and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaChina Electric Power Research Institute, Beijing 100085, ChinaCollege of Water Conservancy and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaCollege of Water Conservancy and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaDispersive soil is a common problem soil in engineering projects, which has the potential risk of causing serious engineering failures. In this paper, calcined waste phosphorus slag (CPS) was chosen to enhance the mechanical properties and reduce soil dispersivity. Dispersive soil samples with 1 % to 10 % CPS content were prepared and cured for 0 to 28 days. The dispersivity identification test was used to assess soil sample dispersivity. The compressive and tensile strength, conductivity, and pH were determined for the soil. Microstructural and mineral composition were analyzed using SEM/EDS, TG/DTG, and XRD analysis. The natural dispersive soil was selected to verify the effect of CPS in improving soil. Experiments show that the CPS inhibits soil dispersivity and converts it into non-dispersive soil. Both compressive and tensile strength increases significantly with the increase in the content of CPS and curing time. The tensile strength of the soil samples cured for 28 days increased by about 76 % and the compressive strength by about 61 % as the mixed content of CPS was increased from 1 % to 10 %. Results show that CPS can improve the strength and modify the dispersivity of soil, its optimal mixing content is 5 %. In addition, using CPS in dispersive soil could also solve the disposal problem of phosphate slag, which is a win-to-win solution.http://www.sciencedirect.com/science/article/pii/S0038080624001021Calcined waste phosphorus slagDispersive soilDispersivityMechanical propertyMechanism |
| spellingShingle | Gaowen Zhao Tao Wu Guanzhou Ren Dongyang Yan Zhen Zhu Shijun Ding Mei Shi Henghui Fan Modifying behavior of calcined waste phosphorus slag on the dispersivity and mechanical properties of dispersive soil Soils and Foundations Calcined waste phosphorus slag Dispersive soil Dispersivity Mechanical property Mechanism |
| title | Modifying behavior of calcined waste phosphorus slag on the dispersivity and mechanical properties of dispersive soil |
| title_full | Modifying behavior of calcined waste phosphorus slag on the dispersivity and mechanical properties of dispersive soil |
| title_fullStr | Modifying behavior of calcined waste phosphorus slag on the dispersivity and mechanical properties of dispersive soil |
| title_full_unstemmed | Modifying behavior of calcined waste phosphorus slag on the dispersivity and mechanical properties of dispersive soil |
| title_short | Modifying behavior of calcined waste phosphorus slag on the dispersivity and mechanical properties of dispersive soil |
| title_sort | modifying behavior of calcined waste phosphorus slag on the dispersivity and mechanical properties of dispersive soil |
| topic | Calcined waste phosphorus slag Dispersive soil Dispersivity Mechanical property Mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S0038080624001021 |
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