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dc.contributor.authorHarjupatana, Tero
dc.contributor.authorMiettinen, Arttu
dc.contributor.authorKataja, Markku
dc.date.accessioned2022-03-28T04:59:54Z
dc.date.available2022-03-28T04:59:54Z
dc.date.issued2022
dc.identifier.citationHarjupatana, T., Miettinen, A., & Kataja, M. (2022). A method for measuring wetting and swelling of bentonite using X-ray imaging. <i>Applied Clay Science</i>, <i>221</i>, Article 106485. <a href="https://doi.org/10.1016/j.clay.2022.106485" target="_blank">https://doi.org/10.1016/j.clay.2022.106485</a>
dc.identifier.otherCONVID_117409177
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/80380
dc.description.abstractA non-invasive method based on X-ray imaging for measuring deformation and water transport in wetting and swelling bentonite samples is introduced. Sequential X-ray images taken of the samples were used to calculate the attenuation coefficient and deformation. These results, together with careful calibration, allowed finding the dry density and water content distributions and their temporal evolution in the wetting and swelling samples. A specific correction technique, based on regularly taking reference X-ray images of aluminum plates of varying thickness, was developed and used to take into account X-ray beam instabilities and thus to improve the accuracy of density analysis. Large deformation, present in the experiments, was measured with an improved version of a block-matching algorithm. The X-ray imaging method was used here to measure the axial swelling of compacted MX-80 bentonite samples in a tube when in contact with saline solution (0.1 M NaCl). This setup mimics a scenario where bentonite, planned to be used as a buffer material in a nuclear waste repository placed deep in the bedrock, swells into a rock fracture filled by groundwater. The method yielded potentially valuable data on hydro-mechanical behavior of bentonite, which may be used in developing and validating material models to be used in safety assessment of nuclear waste repository concepts.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofseriesApplied Clay Science
dc.rightsCC BY 4.0
dc.subject.otherX-ray imaging
dc.subject.otherDeformation
dc.subject.otherSwelling
dc.titleA method for measuring wetting and swelling of bentonite using X-ray imaging
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202203282065
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn0169-1317
dc.relation.volume221
dc.type.versionpublishedVersion
dc.rights.copyright© 2022 The Author(s). Published by Elsevier B.V.
dc.rights.accesslevelopenAccessfi
dc.subject.ysovesi
dc.subject.ysobentoniitti
dc.subject.ysovesipitoisuus
dc.subject.ysotomografia
dc.subject.ysosavi
dc.subject.ysokulkeutuminen
dc.subject.ysoröntgenkuvaus
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p3792
jyx.subject.urihttp://www.yso.fi/onto/yso/p2464
jyx.subject.urihttp://www.yso.fi/onto/yso/p11093
jyx.subject.urihttp://www.yso.fi/onto/yso/p17798
jyx.subject.urihttp://www.yso.fi/onto/yso/p2465
jyx.subject.urihttp://www.yso.fi/onto/yso/p13278
jyx.subject.urihttp://www.yso.fi/onto/yso/p10181
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1016/j.clay.2022.106485
jyx.fundinginformationThe research leading to these results has received funding from the European Atomic Energy Community's 7th Framework Programme (FP7/2007-2011) under grant agreement no. 295487.
dc.type.okmA1


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