Influence of structure on the compression behaviour of two very stiff fissured high plasticity Eocene clays

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A series of one-dimensional compression tests have been performed on reconstituted specimens of Søvind Marl. A clear correlation is obtained between the location and the gradient of the intrinsic compression lines and the void ratio at the liquid limit. The found correlation has subsequently been used tonormalise the compression curves of 12 one-dimensional compression tests on intact specimens of Søvind Marl and Little Belt Clay obtained from various depths at two sites at Aarhus Harbour. Søvind Marl and Little Belt Clay are both marine sedimentary clays of Eocene age, which can be characterised as very stiff fissured clays with a very high plasticity. From a comparison of the reconstituted and intact compression paths the influence of structure is analysed and discussed in the paper. The majority of intact specimens of Søvind Marl
and Little Belt Clay from Aarhus Harbour show similar behaviour; a very stiff recompression path and yielding at high stress level after crossing the intrinsic compression line. The displayed behaviour indicates an insignificant influence of fissuring on the pre-yield behaviour. Post-yield the compression paths indicate a
stable structure dominated by fabric rather than metastable interparticle bonds. The paper furthermore highlights the importance of considering the effect of pore water salinity when assessing the influence of structure on the compression behaviour of smectite rich natural marine clays.
OriginalsprogEngelsk
Udgivelsesår2019
StatusAccepteret/In press - 2019
Begivenhed7th International Symposium on Deformation Characteristics of Geomaterials - Strathclyde's Technology & Innovation Centre, Glasgow, Storbritannien
Varighed: 26 jun. 201928 jun. 2019
https://www.is-glasgow2019.org.uk

Konference

Konference7th International Symposium on Deformation Characteristics of Geomaterials
LokationStrathclyde's Technology & Innovation Centre
LandStorbritannien
ByGlasgow
Periode26/06/201928/06/2019
Internetadresse

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