Impact of typical environments in China's western mountainous areas on the durability of railway concrete: a review
Purpose – This study aims to analyze the impact mechanism of typical environments in China's western mountainous areas on the durability of railway concrete and propose measures to improve durability. Design/methodology/approach – With the continuous promotion of infrastructure construction, th...
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| Format: | Article |
| Language: | English |
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Emerald Publishing
2024-10-01
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| Series: | Railway Sciences |
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| Online Access: | https://www.emerald.com/insight/content/doi/10.1108/RS-08-2024-0032/full/pdf |
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| author | Jiahe Wang Yanbin Tan Huajian Li Xinhua Zhong Jiaxuan Wang Yu Gao |
| author_facet | Jiahe Wang Yanbin Tan Huajian Li Xinhua Zhong Jiaxuan Wang Yu Gao |
| author_sort | Jiahe Wang |
| collection | DOAJ |
| description | Purpose – This study aims to analyze the impact mechanism of typical environments in China's western mountainous areas on the durability of railway concrete and propose measures to improve durability. Design/methodology/approach – With the continuous promotion of infrastructure construction, the focus of China's railway construction has gradually shifted to the western region. The four typical environments of large temperature differences, strong winds and dryness, high cold and low air pressure unique to the western mountainous areas of China have adverse effects on the durability of typical railway structure concrete (bridges, ballastless tracks and tunnels). This study identified the characteristics of four typical environments in the western mountainous areas of China through on-site research. The impact mechanism of the four typical environments on the durability of concrete in different structural parts of railways has been explored through theoretical analysis and experimental research; Finally, a strategy for improving the durability of railway concrete suitable for the western mountainous areas of China was proposed. Findings – The daily temperature difference in the western mountainous areas of China is more than twice that of the plain region, which will lead to significant temperature deformation and stress in the multi-layered structure of railway ballastless tracks. It will result in cracking. The wind speed in the western plateau region is about 2.5 to 3 times that of the plain region, and the average annual rainfall is only 1/5 of that in the plain region. The drying effect on the surface of casting concrete will significantly accelerate its cracking process, leading to serious durability problems. The environmental temperature in the western mountainous areas of China is generally low, and there are more freeze-thaw cycles, which will increase the risk of freeze-thaw damage to railway concrete. The environmental air pressure in the western plateau region is only 60% of that in the plain region. The moisture inside the concrete is more likely to diffuse into the surrounding environment under the pressure difference, resulting in greater water loss and shrinkage deformation of the concrete in the plateau region. The above four issues will collectively lead to the rapid deterioration of concrete durability in the western plateau region. The corresponding durability improvement suggestions from theoretical research, new technology development and standard system was proposed in this paper. Originality/value – The research can provide the mechanism of durability degradation of railway concrete in the western mountainous areas of China and corresponding improvement strategies. |
| format | Article |
| id | doaj-art-6b5ae3d9ffc84d0ca25eed0899289f92 |
| institution | OA Journals |
| issn | 2755-0907 2755-0915 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Emerald Publishing |
| record_format | Article |
| series | Railway Sciences |
| spelling | doaj-art-6b5ae3d9ffc84d0ca25eed0899289f922025-08-20T02:10:32ZengEmerald PublishingRailway Sciences2755-09072755-09152024-10-013565066910.1108/RS-08-2024-0032Impact of typical environments in China's western mountainous areas on the durability of railway concrete: a reviewJiahe Wang0Yanbin Tan1Huajian Li2Xinhua Zhong3Jiaxuan Wang4Yu Gao5China Academy of Railway Sciences Corporation Limited, Railway Engineering Research Institution, Beijing, ChinaChina Academy of Railway Sciences Corporation Limited, Railway Engineering Research Institution, Beijing, ChinaChina Academy of Railway Sciences Corporation Limited, Railway Engineering Research Institution, Beijing, ChinaChina Academy of Railway Sciences Corporation Limited, Railway Engineering Research Institution, Beijing, ChinaChina Academy of Railway Sciences Corporation Limited, Railway Engineering Research Institution, Beijing, ChinaChina Academy of Railway Sciences Corporation Limited, Railway Engineering Research Institution, Beijing, ChinaPurpose – This study aims to analyze the impact mechanism of typical environments in China's western mountainous areas on the durability of railway concrete and propose measures to improve durability. Design/methodology/approach – With the continuous promotion of infrastructure construction, the focus of China's railway construction has gradually shifted to the western region. The four typical environments of large temperature differences, strong winds and dryness, high cold and low air pressure unique to the western mountainous areas of China have adverse effects on the durability of typical railway structure concrete (bridges, ballastless tracks and tunnels). This study identified the characteristics of four typical environments in the western mountainous areas of China through on-site research. The impact mechanism of the four typical environments on the durability of concrete in different structural parts of railways has been explored through theoretical analysis and experimental research; Finally, a strategy for improving the durability of railway concrete suitable for the western mountainous areas of China was proposed. Findings – The daily temperature difference in the western mountainous areas of China is more than twice that of the plain region, which will lead to significant temperature deformation and stress in the multi-layered structure of railway ballastless tracks. It will result in cracking. The wind speed in the western plateau region is about 2.5 to 3 times that of the plain region, and the average annual rainfall is only 1/5 of that in the plain region. The drying effect on the surface of casting concrete will significantly accelerate its cracking process, leading to serious durability problems. The environmental temperature in the western mountainous areas of China is generally low, and there are more freeze-thaw cycles, which will increase the risk of freeze-thaw damage to railway concrete. The environmental air pressure in the western plateau region is only 60% of that in the plain region. The moisture inside the concrete is more likely to diffuse into the surrounding environment under the pressure difference, resulting in greater water loss and shrinkage deformation of the concrete in the plateau region. The above four issues will collectively lead to the rapid deterioration of concrete durability in the western plateau region. The corresponding durability improvement suggestions from theoretical research, new technology development and standard system was proposed in this paper. Originality/value – The research can provide the mechanism of durability degradation of railway concrete in the western mountainous areas of China and corresponding improvement strategies.https://www.emerald.com/insight/content/doi/10.1108/RS-08-2024-0032/full/pdfWestern mountainous areasConcreteDurabilityEnvironment |
| spellingShingle | Jiahe Wang Yanbin Tan Huajian Li Xinhua Zhong Jiaxuan Wang Yu Gao Impact of typical environments in China's western mountainous areas on the durability of railway concrete: a review Railway Sciences Western mountainous areas Concrete Durability Environment |
| title | Impact of typical environments in China's western mountainous areas on the durability of railway concrete: a review |
| title_full | Impact of typical environments in China's western mountainous areas on the durability of railway concrete: a review |
| title_fullStr | Impact of typical environments in China's western mountainous areas on the durability of railway concrete: a review |
| title_full_unstemmed | Impact of typical environments in China's western mountainous areas on the durability of railway concrete: a review |
| title_short | Impact of typical environments in China's western mountainous areas on the durability of railway concrete: a review |
| title_sort | impact of typical environments in china s western mountainous areas on the durability of railway concrete a review |
| topic | Western mountainous areas Concrete Durability Environment |
| url | https://www.emerald.com/insight/content/doi/10.1108/RS-08-2024-0032/full/pdf |
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