Experimental evaluation of time effect on swelling pressure in high plasticity clay

E. Peri*, S. D. Nielsen, B. N. Nielsen, L. Damkilde

*Corresponding author for this work

Research output: Contribution to journalConference article in JournalResearchpeer-review

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Abstract

Søvind Marl, a high plasticity overconsolidated Danish Paleogene clay, is a stiff clay known to exhibit swelling potential. The dependency of its swelling pressure on time is investigated by performing constant volume (CV) tests. Long periods of swelling are applied to the samples. Two samples are allowed to swell for 19 weeks, the other two only for 24 hours. The long-lasting tests show that the swelling pressure reaches the maximum value (σ'cv) after 13 weeks of testing, and the change between the σ'cv and the swelling pressure after 24 hours reaches 38%. In order to correct the underestimation of σ'cv due to the sampling, a graphical correction of the consolidation curve is made. Due to the characteristic smooth yielding of the Søvind Marl, the graphical correction can be affected by personal interpretation.

Original languageEnglish
Article number012022
JournalIOP Conference Series: Earth and Environmental Science
Volume710
Issue number1
ISSN1755-1307
DOIs
Publication statusPublished - 26 Apr 2021
Event18th Nordic Geotechnical Meeting, NGM 2020 - Helsinki, Virtual, Finland
Duration: 18 Jan 202119 Jan 2021

Conference

Conference18th Nordic Geotechnical Meeting, NGM 2020
Country/TerritoryFinland
CityHelsinki, Virtual
Period18/01/202119/01/2021

Bibliographical note

Publisher Copyright:
© Published under licence by IOP Publishing Ltd.

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