Oedometer Creep Tests of a Partially Saturated Kaolinite Clay
In the following paper an influence of several state parameters on one dimensional time-dependent material behaviour of an unsaturated soil is presented. For identification of parameter values, laboratory experiments were performed. Standard oedometric compression tests were carried out to investigate stress-strain-time relationships. Apart from the degree of saturation the initial void ratio vary as parameters. For measuring the matrix suction a tensiometer is mounted inside the specimen. A detailed description of the equipment used and the test procedures are given in the paper. The tests reported here were carried out with a kaolinite to determine parameter values, depending on different state variables. The characteristic behaviour of unsaturated samples observed during consolidation and creeping is shown in a series of figures. Parameters like Cc, Cs and Cα are used in constitutive model that can simulate both consolidation processes as well as creep phenomenon for partially saturated clay in a single consistent analysis.
Key Wordskaolinite oedometer creep partially saturated clay suction
Unable to display preview. Download preview PDF.
- Berre T, Iversen K (1972) Oedometer tests with different specimen heights on a clay exhibiting large secondary compressionn, Geotechnique 22(1): 53–70Google Scholar
- Buisman K (1936) Results of long-duration settlement tests. In: Proceedings 1st International Conference on Soil Mechanics and Foundation Engineering, Cambridge, Mass. Vol.1, pp. 103-107Google Scholar
- Dobrowolsky M, Becker A (2002) Adsorptions- und Desorptionsverhalten durchströmter bindiger Böden. 4. Workshop Teilgesättigte Böden, Schriftenreihe Geotechnik der Bauhaus-Universität Weimar, Heft 8, pp. 71–76Google Scholar
- Krieg S (2000) Viskoses Bodenverhalten von Mudden, Seeton und Klei, Heft 150, Veröffentlichung des Institutes für Bodenmechanik und Felsmechanik der Universität Fridericiana in KarlsruheGoogle Scholar
- Leroueil S, Kabbaj M, Tavenas F, Bouchard R (1985) Stress-strain-strain rate relation fot the compressibility of sensitive natural clays, Geotechnique 35(2): 159–180Google Scholar
- Niemunis A, Krieg S (1996) Viscous behaviour of soil under oedometric conditions, Can. Geotech. J. 33: 159–168Google Scholar
- Yin J-H (1999) Non-linear creep of soils in oedometer tests, Geotechnique 49(5): 669–707Google Scholar