In‐Situ Observation of Cracks in Frozen Soil using Synchrotron Tomography
ABSTRACT Phase‐contrast synchrotron micro‐computed tomography (μCT) is well suited to studying the microstructure of frozen soil. To take advantage of the high‐resolution three‐dimensional images that can be generated using μCT, a specialised in‐situ rig was designed and commissioned. This miniature...
Published in: | Permafrost and Periglacial Processes |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2012
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/ppp.1737 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1737 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1737 |
id |
crwiley:10.1002/ppp.1737 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/ppp.1737 2024-09-09T20:03:24+00:00 In‐Situ Observation of Cracks in Frozen Soil using Synchrotron Tomography Bhreasail, Á. Ní Lee, P. D. O'Sullivan, C. Fenton, C. H. Hamilton, R. Rockett, P. Connolley, T. 2012 http://dx.doi.org/10.1002/ppp.1737 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1737 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1737 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 23, issue 2, page 170-176 ISSN 1045-6740 1099-1530 journal-article 2012 crwiley https://doi.org/10.1002/ppp.1737 2024-06-18T04:12:04Z ABSTRACT Phase‐contrast synchrotron micro‐computed tomography (μCT) is well suited to studying the microstructure of frozen soil. To take advantage of the high‐resolution three‐dimensional images that can be generated using μCT, a specialised in‐situ rig was designed and commissioned. This miniature temperature‐controlled oedometer is capable of controlling soil sample thermal gradients and applying uniaxial deformation while measuring stress. This system was used to apply repeated freeze‐thaw cycles to water‐saturated samples of Leighton Buzzard sand, Reigate sand and spherical glass ballotini (an idealised soil). High‐resolution images were obtained using a monochromatic, parallel beam of x‐rays generated on Beamline I12 of the Diamond synchrotron. Cracking in the ice was directly measured utilising the phase‐contrast fringes generated by ice‐air interfaces. Examination of these images revealed two modes of crack formation in the ice phase of frozen soil: micro‐cracks between soil particles, and longer, well‐developed cracks that follow along ice‐soil particle boundaries and span across the ice between particles. Both crack types were orientated parallel to the freezing front (normal to the heat flow), affecting both the frozen soils' mechanical behaviour, and we hypothesise that these cracks are potential initiation sites for ice lens development. Copyright © 2012 John Wiley & Sons, Ltd. Article in Journal/Newspaper Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes 23 2 170 176 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT Phase‐contrast synchrotron micro‐computed tomography (μCT) is well suited to studying the microstructure of frozen soil. To take advantage of the high‐resolution three‐dimensional images that can be generated using μCT, a specialised in‐situ rig was designed and commissioned. This miniature temperature‐controlled oedometer is capable of controlling soil sample thermal gradients and applying uniaxial deformation while measuring stress. This system was used to apply repeated freeze‐thaw cycles to water‐saturated samples of Leighton Buzzard sand, Reigate sand and spherical glass ballotini (an idealised soil). High‐resolution images were obtained using a monochromatic, parallel beam of x‐rays generated on Beamline I12 of the Diamond synchrotron. Cracking in the ice was directly measured utilising the phase‐contrast fringes generated by ice‐air interfaces. Examination of these images revealed two modes of crack formation in the ice phase of frozen soil: micro‐cracks between soil particles, and longer, well‐developed cracks that follow along ice‐soil particle boundaries and span across the ice between particles. Both crack types were orientated parallel to the freezing front (normal to the heat flow), affecting both the frozen soils' mechanical behaviour, and we hypothesise that these cracks are potential initiation sites for ice lens development. Copyright © 2012 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Bhreasail, Á. Ní Lee, P. D. O'Sullivan, C. Fenton, C. H. Hamilton, R. Rockett, P. Connolley, T. |
spellingShingle |
Bhreasail, Á. Ní Lee, P. D. O'Sullivan, C. Fenton, C. H. Hamilton, R. Rockett, P. Connolley, T. In‐Situ Observation of Cracks in Frozen Soil using Synchrotron Tomography |
author_facet |
Bhreasail, Á. Ní Lee, P. D. O'Sullivan, C. Fenton, C. H. Hamilton, R. Rockett, P. Connolley, T. |
author_sort |
Bhreasail, Á. Ní |
title |
In‐Situ Observation of Cracks in Frozen Soil using Synchrotron Tomography |
title_short |
In‐Situ Observation of Cracks in Frozen Soil using Synchrotron Tomography |
title_full |
In‐Situ Observation of Cracks in Frozen Soil using Synchrotron Tomography |
title_fullStr |
In‐Situ Observation of Cracks in Frozen Soil using Synchrotron Tomography |
title_full_unstemmed |
In‐Situ Observation of Cracks in Frozen Soil using Synchrotron Tomography |
title_sort |
in‐situ observation of cracks in frozen soil using synchrotron tomography |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1002/ppp.1737 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1737 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1737 |
genre |
Permafrost and Periglacial Processes |
genre_facet |
Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 23, issue 2, page 170-176 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.1737 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
23 |
container_issue |
2 |
container_start_page |
170 |
op_container_end_page |
176 |
_version_ |
1809935357002645504 |