Experimental investigation of thermo-hydro-mechanical behaviour of an unsaturated silt

Experimental research is conducted on a compacted sample of silt using a triaxial equipment modified for testing unsaturated soils at elevated temperatures. An extensive array of isothermal and non-isothermal tests is conducted, including temperature-controlled soaking and desaturation tests, temperature- and suction-controlled isotropic consolidation tests, and suction-controlled thermal loading and unloading tests. Temperature values applied ranged from 25°C to 60°C, and the suction values varied from 0 to 300 kPa. Baseline data are presented on the influences of temperature and suction on critical-state parameters, yield surface, preconsolidation pressure, strength properties, and water retention characteristics of the soil. All data are carefully analysed and prevailing trends are highlighted.

[1]  Nabil Sultan,et al.  The thermal consolidation of Boom clay , 2000, Poromechanics.

[2]  Nasser Khalili,et al.  A fully coupled flow deformation model for cyclic analysis of unsaturated soils including hydraulic and mechanical hystereses , 2008 .

[3]  Nasser Khalili,et al.  Effective Stress in Unsaturated Soils: Review with New Evidence , 2004 .

[4]  L. Laloui,et al.  Experimental study of thermal effects on the mechanical behaviour of a clay , 2004 .

[5]  Antonio Gens,et al.  Suction effects on a compacted clay under non-isothermal conditions , 2003 .

[6]  Nasser Khalili,et al.  An effective stress elastic–plastic model for unsaturated porous media , 2002 .

[7]  J. Graham,et al.  Modified cam-clay modelling of temperature effects in clays , 2001 .

[8]  Nabil Sultan,et al.  A thermomechanical model for saturated clays , 2000 .

[9]  N. Khalili,et al.  A unique relationship for χ for the determination of the shear strength of unsaturated soils , 1998 .

[10]  T. Hueckel,et al.  A constitutive study of thermo‐elasto‐plasticity of deep carbonatic clays , 1998 .

[11]  P. Fox,et al.  Effects of stress and temperature on secondary compression of peat , 1996 .

[12]  Y. Cui,et al.  Yielding and plastic behaviour of an unsaturated compacted silt , 1996 .

[13]  I. Towhata,et al.  TEMPERATURE EFFECTS ON UNDRAINED SHEAR CHARACTERISTICS OF CLAY , 1995 .

[14]  Simon J. Wheeler,et al.  An elasto-plastic critical state framework for unsaturated soil , 1995 .

[15]  I. Towhata,et al.  Volume Change of Clays Induced by Heating as Observed in Consolidation Tests , 1993 .

[16]  Said Taibi,et al.  Behavior of clayey soils on drying–wetting paths , 1993 .

[17]  T. Hueckel,et al.  Effective stress and water pressure in saturated clays during heating–cooling cycles , 1992 .

[18]  T. Hueckel,et al.  Thermoplasticity of Saturated Clays: Experimental Constitutive Study , 1990 .

[19]  Tomasz Hueckel,et al.  Thermoplasticity of Saturated Soils and Shales: Constitutive Equations , 1990 .

[20]  Antonio Gens,et al.  A constitutive model for partially saturated soils , 1990 .

[21]  T. Hueckel,et al.  Thermal volume changes of the mineral–water system in low-porosity clay soils , 1988 .

[22]  W. N. Houston,et al.  Thermo‐Mechanical Behavior of Seafloor Sediments , 1985 .

[23]  James Graham,et al.  Yield states and stress–strain relationships in a natural plastic clay , 1983 .

[24]  K. Demars,et al.  Soil volume changes induced by temperature cycling , 1982 .