Influence de la température sur le fluage d’une argile compactée

Abstract : The impact of temperature on the creep deformation of compacted clayey soils is a major issue in the prediction of the very long term settlement of soils used as engineered barriers for the disposal of high and long-life radioactive wastes at great depth. This paper is focused on the creep behavior of two compacted materials, illite and a swelling clayey soil, as a function of temperature and suction. Specific temperature controlled oedometric cells have been developed to perform constant rate of strain (CRS) consolidation tests under different strain rates (0.002%/min to 0.02%/min) within a temperature range of 5 to 70° C. Results indicated that the compression and swelling indices could be considered independent of temperature and strain rate with both materials. With temperature increase, the preconsolidation pressure decreased, and creep index increased. This can be related to a soil softening behavior under high temperatures.
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Nidal Jarad, Olivier Cuisinier, Farimah Masrouri. Influence de la température sur le fluage d’une argile compactée. 19th International Conference on Soil Mechanics and Geotechnical Engineering, ISSMGE, Sep 2017, Séoul, Corée du Sud. ⟨hal-01754457⟩

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