Mechanical Properties and Mesostructure Evolution of Fibre-Reinforced Loess under Freeze-Thaw Cycles
The strength of loess in seasonal frozen soil areas decreases evidently due to the freeze-thaw cycle, which even leads to some engineering and geological problems. Fibre reinforcement is very effective in improving the mechanical properties of soil. Triaxial tests under different water contents, fre...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2023-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2023/3847003 |
| _version_ | 1797637758617911296 |
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| author | Longfei Zhang Zaiqiang Hu Hongru Li Haicheng She Xiaoliang Wang Xiaoning Han Xi Yang |
| author_facet | Longfei Zhang Zaiqiang Hu Hongru Li Haicheng She Xiaoliang Wang Xiaoning Han Xi Yang |
| author_sort | Longfei Zhang |
| collection | DOAJ |
| description | The strength of loess in seasonal frozen soil areas decreases evidently due to the freeze-thaw cycle, which even leads to some engineering and geological problems. Fibre reinforcement is very effective in improving the mechanical properties of soil. Triaxial tests under different water contents, freezing temperatures, and number of freeze-thaw cycles were carried out for fibre-reinforced loess to study the ability of fibre reinforcement to improve the resistance of loess to freeze-thaw damage; scanning electron microscopy (SEM) was also conducted. The effects of freeze and thaw deterioration and reinforcement were discussed by comparing the strength parameters under different test conditions, and the influence mechanism of freezing temperature, number of freeze-thaw cycles, and reinforcement on loess strength was explained. Results show that a lower freezing temperature indicates a more evident decrease in strength after thawing. Under the action of the first five freeze-thaw cycles, the degree of decrease is more prominent. The fibre reinforcement can reduce the fragmentation of aggregates in loess, thereby effectively restraining the deterioration effect of loess during freeze-thaw cycles. Finally, the strength parameter prediction model under different freeze-thaw cycles of reinforced loess is established, thereby providing theoretical support for engineering application and numerical simulation of fibre-reinforced loess. |
| first_indexed | 2024-03-11T12:54:01Z |
| format | Article |
| id | doaj.art-d9549a1cd743433c9cbd8b873e75d529 |
| institution | Directory Open Access Journal |
| issn | 1687-8094 |
| language | English |
| last_indexed | 2024-03-11T12:54:01Z |
| publishDate | 2023-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj.art-d9549a1cd743433c9cbd8b873e75d5292023-11-04T00:00:01ZengHindawi LimitedAdvances in Civil Engineering1687-80942023-01-01202310.1155/2023/3847003Mechanical Properties and Mesostructure Evolution of Fibre-Reinforced Loess under Freeze-Thaw CyclesLongfei Zhang0Zaiqiang Hu1Hongru Li2Haicheng She3Xiaoliang Wang4Xiaoning Han5Xi Yang6Institute of Geotechnical EngineeringInstitute of Geotechnical EngineeringInstitute of Geotechnical EngineeringSchool of Urban ConstructionInstitute of Geotechnical EngineeringInstitute of Geotechnical EngineeringInstitute of Geotechnical EngineeringThe strength of loess in seasonal frozen soil areas decreases evidently due to the freeze-thaw cycle, which even leads to some engineering and geological problems. Fibre reinforcement is very effective in improving the mechanical properties of soil. Triaxial tests under different water contents, freezing temperatures, and number of freeze-thaw cycles were carried out for fibre-reinforced loess to study the ability of fibre reinforcement to improve the resistance of loess to freeze-thaw damage; scanning electron microscopy (SEM) was also conducted. The effects of freeze and thaw deterioration and reinforcement were discussed by comparing the strength parameters under different test conditions, and the influence mechanism of freezing temperature, number of freeze-thaw cycles, and reinforcement on loess strength was explained. Results show that a lower freezing temperature indicates a more evident decrease in strength after thawing. Under the action of the first five freeze-thaw cycles, the degree of decrease is more prominent. The fibre reinforcement can reduce the fragmentation of aggregates in loess, thereby effectively restraining the deterioration effect of loess during freeze-thaw cycles. Finally, the strength parameter prediction model under different freeze-thaw cycles of reinforced loess is established, thereby providing theoretical support for engineering application and numerical simulation of fibre-reinforced loess.http://dx.doi.org/10.1155/2023/3847003 |
| spellingShingle | Longfei Zhang Zaiqiang Hu Hongru Li Haicheng She Xiaoliang Wang Xiaoning Han Xi Yang Mechanical Properties and Mesostructure Evolution of Fibre-Reinforced Loess under Freeze-Thaw Cycles Advances in Civil Engineering |
| title | Mechanical Properties and Mesostructure Evolution of Fibre-Reinforced Loess under Freeze-Thaw Cycles |
| title_full | Mechanical Properties and Mesostructure Evolution of Fibre-Reinforced Loess under Freeze-Thaw Cycles |
| title_fullStr | Mechanical Properties and Mesostructure Evolution of Fibre-Reinforced Loess under Freeze-Thaw Cycles |
| title_full_unstemmed | Mechanical Properties and Mesostructure Evolution of Fibre-Reinforced Loess under Freeze-Thaw Cycles |
| title_short | Mechanical Properties and Mesostructure Evolution of Fibre-Reinforced Loess under Freeze-Thaw Cycles |
| title_sort | mechanical properties and mesostructure evolution of fibre reinforced loess under freeze thaw cycles |
| url | http://dx.doi.org/10.1155/2023/3847003 |
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