Journal
COMPUTERS AND GEOTECHNICS
Volume 80, Issue -, Pages 26-40Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2016.06.009
Keywords
Thermal volume change; Thermal creep; Geothermal; Constitutive modeling
Categories
Funding
- National Science Foundation [CMMI-0928159]
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The thermal volume change of soils is typically interpreted using the stress history and changes in yield stress with temperature (thermal softening). However, the path followed to reach a given stress state may lead to different thermal volume changes. Alternative mechanisms of thermal volume change are explored using data from the literature and isotropic, drained heating tests on compacted silt. No relationship between thermal volume change and degree of saturation was observed. However, a clear relationship with the secondary compression prior to heating was observed, indicating that thermally accelerated creep may provide better thermal volume change predictions than thermal softening. (C) 2016 Elsevier Ltd. All rights reserved.
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