Swelling and chemical degradation of sulfur-bearing fillers in high-speed railway subgrade: Effect of pH on ion release and material deterioration
文献类型：期刊论文
| 作者 | Liu, Zihang3,4; Dai, Zhangjun4; Song, Xiaodong2; Yang, Lanqiang1; Yu, Fei4; Chen, Shanxiong4 |
| 刊名 | TRANSPORTATION GEOTECHNICS
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 51页码:15 |
| 关键词 | Sulfur-bearing fillers SO42- concentration pH High-speed railway Subgrade |
| ISSN号 | 2214-3912 |
| DOI | 10.1016/j.trgeo.2025.101546 |
| 英文摘要 | The deformation and degradation of sulfur-bearing fillers are critical factors affecting the long-term performance of high-speed railway subgrade materials. This study investigates the swelling and chemical degradation behavior of sulfur-bearing fillers under different pH environments (acidic pH = 2.03, neutral pH = 6.97, and alkaline pH = 11.95). Advanced analytical methods, including Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and Ion Chromatography (IC), were utilized to explore the structural and chemical changes in these materials. Results demonstrate that alkaline conditions significantly accelerate degradation, characterized by a higher rate of SO4 2- release and an increase in porosity to 25.65 %, compared to 12.87 % in acidic conditions. The degradation process comprises three distinct stages: rapid initial degradation, intermediate deceleration, and final stabilization. Under alkaline conditions, the formation of white precipitates and increased fissures were observed, indicating severe structural deterioration. Conversely, acidic environments exhibit an inhibitory effect on filler degradation, characterized by reduced ion release rates and lower total ion concentrations. These findings enhance the understanding of the degradation mechanism of sulfur-bearing fillers and provide a basis for improving subgrade material selection and durability design in high-speed railway projects. |
| 资助项目 | National Natural Science Founda-tion of China[42172308] ; Youth Innovation Promotion Asso-ciation CAS[2022331] ; Science and Technology Research and Development Program of China Railway Guangzhou Group Co., Ltd.[2023K022-K] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001447816800001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36582]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Dai, Zhangjun |
| 作者单位 | 1.Ningbo Urban Construct Design & Res Inst Co Ltd, Ningbo 315000, Peoples R China 2.Shanghai Kunming High Speed Railway Hunan Co Ltd, Changsha 410000, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Zihang,Dai, Zhangjun,Song, Xiaodong,et al. Swelling and chemical degradation of sulfur-bearing fillers in high-speed railway subgrade: Effect of pH on ion release and material deterioration[J]. TRANSPORTATION GEOTECHNICS,2025,51:15. |
| APA | Liu, Zihang,Dai, Zhangjun,Song, Xiaodong,Yang, Lanqiang,Yu, Fei,&Chen, Shanxiong.(2025).Swelling and chemical degradation of sulfur-bearing fillers in high-speed railway subgrade: Effect of pH on ion release and material deterioration.TRANSPORTATION GEOTECHNICS,51,15. |
| MLA | Liu, Zihang,et al."Swelling and chemical degradation of sulfur-bearing fillers in high-speed railway subgrade: Effect of pH on ion release and material deterioration".TRANSPORTATION GEOTECHNICS 51(2025):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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