Effect of Fines Content on the Compression Behavior of Calcareous Sand
Due to the hydraulic sorting effect in the hydraulic filling process, a fine-grained aggregate layer dominated by silty fine sand with uneven distribution is easily formed in reclamation projects, which triggers issues with the bearing capacity and nonuniform settlement of calcareous sand foundation...
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MDPI AG
2024-11-01
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| author | Suhang Huang Xiaonan Gong |
| author_facet | Suhang Huang Xiaonan Gong |
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| description | Due to the hydraulic sorting effect in the hydraulic filling process, a fine-grained aggregate layer dominated by silty fine sand with uneven distribution is easily formed in reclamation projects, which triggers issues with the bearing capacity and nonuniform settlement of calcareous sand foundations. In this study, a series of one-dimensional compression tests were conducted to investigate the effect of different fines contents (<i>f</i><sub>c</sub>) on the compression behavior of calcareous sand. The results show that at the same relative density (medium-density, <i>D</i><sub>r</sub> = 50%), the addition of fine particles leads to a reduction in the initial void ratio (for <i>f</i><sub>c</sub> ≤ 40%). Furthermore, while the compressibility of the soil samples increases with the rising of fines content, it begins to decrease with further addition of fine particles beyond a threshold value of fines content (<i>f</i><sub>c-th</sub>). Additionally, particle crushing contributes to the compressive deformation of calcareous sand, and the particle relative breakage of calcareous sand increases at the initial stage of adding fine particles. Moreover, a comparison of the compression test results between calcareous silty sand (<i>f</i><sub>c</sub> = 10%) and clean sand reveals that the addition of fine particles accentuates the compressibility differences among calcareous sands with different relative densities. These findings provide valuable insights for addressing the challenges posed by fine-grained layers in calcareous sand foundations. |
| format | Article |
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| publishDate | 2024-11-01 |
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| spelling | doaj-art-4b2f6cc37e3a40039cbf232a29899d1f2025-08-20T02:08:02ZengMDPI AGApplied Sciences2076-34172024-11-0114221045710.3390/app142210457Effect of Fines Content on the Compression Behavior of Calcareous SandSuhang Huang0Xiaonan Gong1Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaResearch Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaDue to the hydraulic sorting effect in the hydraulic filling process, a fine-grained aggregate layer dominated by silty fine sand with uneven distribution is easily formed in reclamation projects, which triggers issues with the bearing capacity and nonuniform settlement of calcareous sand foundations. In this study, a series of one-dimensional compression tests were conducted to investigate the effect of different fines contents (<i>f</i><sub>c</sub>) on the compression behavior of calcareous sand. The results show that at the same relative density (medium-density, <i>D</i><sub>r</sub> = 50%), the addition of fine particles leads to a reduction in the initial void ratio (for <i>f</i><sub>c</sub> ≤ 40%). Furthermore, while the compressibility of the soil samples increases with the rising of fines content, it begins to decrease with further addition of fine particles beyond a threshold value of fines content (<i>f</i><sub>c-th</sub>). Additionally, particle crushing contributes to the compressive deformation of calcareous sand, and the particle relative breakage of calcareous sand increases at the initial stage of adding fine particles. Moreover, a comparison of the compression test results between calcareous silty sand (<i>f</i><sub>c</sub> = 10%) and clean sand reveals that the addition of fine particles accentuates the compressibility differences among calcareous sands with different relative densities. These findings provide valuable insights for addressing the challenges posed by fine-grained layers in calcareous sand foundations.https://www.mdpi.com/2076-3417/14/22/10457calcareous sandfines contentrelative densityinitial void ratiocompressibilityparticle breakage |
| spellingShingle | Suhang Huang Xiaonan Gong Effect of Fines Content on the Compression Behavior of Calcareous Sand Applied Sciences calcareous sand fines content relative density initial void ratio compressibility particle breakage |
| title | Effect of Fines Content on the Compression Behavior of Calcareous Sand |
| title_full | Effect of Fines Content on the Compression Behavior of Calcareous Sand |
| title_fullStr | Effect of Fines Content on the Compression Behavior of Calcareous Sand |
| title_full_unstemmed | Effect of Fines Content on the Compression Behavior of Calcareous Sand |
| title_short | Effect of Fines Content on the Compression Behavior of Calcareous Sand |
| title_sort | effect of fines content on the compression behavior of calcareous sand |
| topic | calcareous sand fines content relative density initial void ratio compressibility particle breakage |
| url | https://www.mdpi.com/2076-3417/14/22/10457 |
| work_keys_str_mv | AT suhanghuang effectoffinescontentonthecompressionbehaviorofcalcareoussand AT xiaonangong effectoffinescontentonthecompressionbehaviorofcalcareoussand |