Title Linear elastic constitutive relation for multiphase porous media using microstructure superposition; freeze-thaw soils
Author Zhang, T.
Author Affil Zhang, T., University of Alaska Fairbanks, Institute of Northern Engineering, Fairbanks, AK
Source Cold Regions Science and Technology, 65(2), p.251-257, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165- 232X
Publication Date Feb. 2011
Notes In English. 19 refs. GeoRef Acc. No: 309490
Index Terms clays; clay minerals; elastic properties; experimentation; freezing; ice; mechanical properties; models; porous materials; sediments; soils; soil tests; solid phases; structural analysis; thawing; microstructure; unfrozen water content; clastic sediments; clay; constitutive equations; elastic constants; equations; experimental studies; fluid phase; frozen soils; linear materials; sheet silicates; silicates; silt; solid phase; ultrastructure; water content
Abstract The constitutive relation derived in our previous work based on the microstructure superposition technique is implemented here for three-phase microstructure configuration to study the mechanical behavior of freeze- thaw soils. Three scenarios were considered for the frozen soils: frozen soil consisting of only two solids, soil skeleton and ice; frozen soil with soil skeleton, ice, and void; and frozen soil consisting soil skeleton, ice and pores saturated with fluid. The frozen soil studied is Alaska frozen soil mainly consisting of clay and silt particles at temperature about -10C. The effective elastic constants were calculated for the media under each scenario using two sets of elastic constants of soil skeleton (clay mineral). The modeled results were compared with Hashin-Shtrikman's upper bound solution and the experimentally measured data. In addition to be able to model the mechanical behavior of freeze-thaw soils, the derived constitutive relation, as indicated in the results of this study, could also be used as a tool in determining the microstructure of freeze-thaw soils by measuring the elastic constants of soil skeleton, the elastic properties and unfrozen water content of the media.
URL http://hdl.handle.net/10.1016/j.coldregions.2010.09.009
Publication Type journal article
Record ID 65006617