Towards a methodology for the characterisation of the fabric of wet clays using x-ray scattering
2019 (English)Conference paper, Published paper (Refereed)
Abstract [en]
X-ray scattering is a promising non-invasive technique to study evolving nano- and micro-mechanics in clays. This study discusses the experimental considerations and a successful method to enable X-ray scattering to study clay samples at two extreme stages of consolidation. It is shown that the proposed sample environment comprising flat capillaries with a hydrophobic coating can be used for a wide range of voids ratios ranging from a clay suspension to consolidated clay samples, that are cut from larger specimens of reconstituted or natural clay. The initial X-ray scattering results using a laboratory instrument indicate that valuable information on, in principal evolving, clay fabric can be measured. Features such as characteristic distance between structural units and particle orientations are obtained for a slurry and a consolidated sample of kaolinite. Combined with other promising measurement techniques from Materials Science the proposed method will help advance the contemporary understanding on the behaviour of dense colloidal systems of clay, as it does not require detrimental sample preparation.
Place, publisher, year, edition, pages
EDP Sciences, 2019.
Series
E3S Web of Conferences, E-ISSN 2267-1242 ; Volume 92
Keywords [en]
Deformation, Kaolinite, Suspensions (fluids), X ray scattering, Characteristic distance, Consolidated clay, Hydrophobic coatings, Measurement techniques, Noninvasive technique, Particle orientation, Sample environment, Sample preparation, Clay
National Category
Geotechnical Engineering and Engineering Geology
Identifiers
URN: urn:nbn:se:hj:diva-56119DOI: 10.1051/e3sconf/20199201005Scopus ID: 2-s2.0-85069711818ISBN: 9782759890644 (electronic)OAI: oai:DiVA.org:hj-56119DiVA, id: diva2:1648065
Conference
7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019, 26 June 2019 through 28 June 2019
2022-03-292022-03-292025-02-07Bibliographically approved