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Freeze-thaw influen...
Freeze-thaw influence on the water retention capacity of silty sand subgrades
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- Everton, José (författare)
- Statens väg- och transportforskningsinstitut,Väg- och banteknik, VBA
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- Saliko, Denis (författare)
- Statens väg- och transportforskningsinstitut,Väg- och banteknik, VBA
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- Erlingsson, Sigurdur, 1960- (författare)
- Statens väg- och transportforskningsinstitut,Infrastruktur, INFRA
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(creator_code:org_t)
- London : CRC Press, 2022
- 2022
- Engelska.
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Ingår i: Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields. - London : CRC Press. - 9781003222897 ; , s. 122-131
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Abstract
Ämnesord
Stäng
- Fine-grained materials are associated with a higher water retention capacity due to their higher surface energy in comparison with coarser materials. That characteristic is connected to why fine-grained materials also yields more suction when drying. In addition, seasonal variation of the water table subjects fine-grained subgrades to different moisture contents, varying the suction built in the subgrade, consequently affecting its mechanical characteristics. As fine-grained materials are frequently frost susceptible, they can cause issues to the whole pavement cross-section related to Freeze-Thaw (F-T) actions, widely known as frost heave and thaw weakening. This study will seek to investigate if subsequent cycles of closed-system F-T can permanently alter the unsaturated behaviour of fine-grained materials, using as background their Soil Water Retention Capacity obtained using a pressure plate apparatus. Such issues may become more common with permafrost areas being subjected to freeze and thaw cycles due to climate change or extraordinary events creating the circumstances to F-T where it is currently not observed. Two silty sands with low plasticity were tested, and the results show a reduced water retention capacity (WRC) after closed-system F-T cycles. Considering that matric suction changes the state of stress of soils, the findings suggest an impact in the resilient modulus (Mr ) not only seasonally, as it is well established, but also after seasonal freezing and thaw events.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Infrastrukturteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Infrastructure Engineering (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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