Freeze-thaw influence on the water retention capacity of silty sand subgrades
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 tabl...
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Statens väg- och transportforskningsinstitut, Väg- och banteknik, VBA
2022
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ftsvtinstitut:oai:DiVA.org:vti-19344 2023-05-15T17:57:56+02:00 Freeze-thaw influence on the water retention capacity of silty sand subgrades Everton, José Saliko, Denis Erlingsson, Sigurdur 2022 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:vti:diva-19344 eng eng Statens väg- och transportforskningsinstitut, Väg- och banteknik, VBA Statens väg- och transportforskningsinstitut, Infrastruktur, INFRA London Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields : Volume 2, p. 122-131 orcid:0000-0001-8597-5752 orcid:0000-0002-0370-3866 orcid:0000-0002-4256-3034 http://urn.kb.se/resolve?urn=urn:nbn:se:vti:diva-19344 urn:isbn:9781003222897 info:eu-repo/semantics/openAccess Infrastructure Engineering Infrastrukturteknik Conference paper info:eu-repo/semantics/conferenceObject text 2022 ftsvtinstitut 2023-01-19T17:13:10Z 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. Conference Object permafrost Swedish National Road and Transport Research Institute: Publications (DiVA) |
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Open Polar |
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Swedish National Road and Transport Research Institute: Publications (DiVA) |
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ftsvtinstitut |
language |
English |
topic |
Infrastructure Engineering Infrastrukturteknik |
spellingShingle |
Infrastructure Engineering Infrastrukturteknik Everton, José Saliko, Denis Erlingsson, Sigurdur Freeze-thaw influence on the water retention capacity of silty sand subgrades |
topic_facet |
Infrastructure Engineering Infrastrukturteknik |
description |
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. |
format |
Conference Object |
author |
Everton, José Saliko, Denis Erlingsson, Sigurdur |
author_facet |
Everton, José Saliko, Denis Erlingsson, Sigurdur |
author_sort |
Everton, José |
title |
Freeze-thaw influence on the water retention capacity of silty sand subgrades |
title_short |
Freeze-thaw influence on the water retention capacity of silty sand subgrades |
title_full |
Freeze-thaw influence on the water retention capacity of silty sand subgrades |
title_fullStr |
Freeze-thaw influence on the water retention capacity of silty sand subgrades |
title_full_unstemmed |
Freeze-thaw influence on the water retention capacity of silty sand subgrades |
title_sort |
freeze-thaw influence on the water retention capacity of silty sand subgrades |
publisher |
Statens väg- och transportforskningsinstitut, Väg- och banteknik, VBA |
publishDate |
2022 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:vti:diva-19344 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields : Volume 2, p. 122-131 orcid:0000-0001-8597-5752 orcid:0000-0002-0370-3866 orcid:0000-0002-4256-3034 http://urn.kb.se/resolve?urn=urn:nbn:se:vti:diva-19344 urn:isbn:9781003222897 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766166440500527104 |