Benchmark of experimental techniques for measuring and controlling suction

The paper presents a benchmarking study carried out within the ‘Mechanics of Unsaturated Soils for Engineering' (MUSE) network aimed at comparing different techniques for measurement and control of suction. Techniques tested by the eight ‘Mechanics of Unsaturated Soils for Engineering' research teams include axis-translation (pressure plate and suction-controlled oedometer), high-capacity tensiometer and osmotic technique. The soil used in the exercise was a mixture of uniform sand, sodium bentonite (active clay) and kaolinite (non-active clay), which were all commercially available. Samples were prepared by one team and distributed to all other teams. They were normally consolidated from slurry under one-dimensional conditions (consolidometer) to a given vertical stress. The water retention characteristics of the initially saturated specimens were investigated along the main drying path. Specimens were de-saturated by applying suction through the liquid phase when using an axis-translation technique or o...

[1]  Jean Canou,et al.  Influence of loading path on the undrained behaviour of a medium loose sand , 2004 .

[2]  S. Lourenço.  SUCTION MEASUREMENTS AND WATER RETENTION IN UNSATURATED SOILS , 2008 .

[3]  Alessandro Tarantino,et al.  A water retention model for deformable soils , 2009 .

[4]  Terreny I Cartogràfica.  CHARACTERISATION AND THERMO-HYDRO- MECHANICAL BEHAVIOUR OF UNSATURATED BOOM CLAY: AN EXPERIMENTAL STUDY , 1999 .

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

[6]  J. H. Atkinson,et al.  An introduction to the mechanics of soils and foundations: through critical state soil mechanics. , 1993 .

[7]  Enrique Romero,et al.  Recent developments in the techniques of controlling and measuring suction in unsaturated soils , 2008 .

[8]  Anh Minh Tang,et al.  Calibration of the osmotic technique of controlling suction with respect to temperature using a miniature tensiometer , 2010 .

[9]  J. Williams,et al.  AN EVALUATION OF POLYETHYLENE GLYCOL (P.E.G.) 6000 AND P.E.G. 20,000 IN THE OSMOTIC CONTROL OF SOIL WATER MATRIC POTENTIAL , 1969 .

[10]  Yu-Jun Cui,et al.  The relationship between suction and swelling properties in a heavily compacted unsaturated clay , 1998 .

[11]  Enrique Edgar Romero Morales,et al.  Characterisation and thermo-hydro-mechanical behaviour of unsaturated Boom clay: an experimental study , 1999 .

[12]  Lyesse Laloui,et al.  AN IMPROVED VOLUME MEASUREMENT FOR DETERMINING SOIL WATER RETENTION CURVES , 2007 .

[13]  Minna Karstunen,et al.  Modelling the variation of degree of saturation in a deformable unsaturated soil , 2003 .

[14]  S. Lourenço,et al.  A new procedure for the determination of soil-water retention curves by continuous drying using high-suction tensiometers , 2011 .

[15]  David G. Toll,et al.  Calibrations of a high-suction tensiometer , 2008 .

[16]  C. Mancuso,et al.  Laboratory testing on an unsaturated soil: equipment, procedures, and first experimental results , 1999 .

[17]  Alessandro Tarantino,et al.  Calibration of tensiometer for direct measurement of matric suction , 2003 .

[18]  Alessandro Tarantino,et al.  Coupling of hydraulic and mechanical behaviour in unsaturated compacted clay , 2005 .

[19]  John Burland,et al.  A NEW APPROACH TO OSMOTICALLY CONTROLLED OEDOMETER TESTING , 1995 .

[20]  Alessandro Tarantino,et al.  Measurement of Matric Suction Using Tensiometric and Axis Translation Techniques , 2008 .

[21]  David G. Toll,et al.  Development of a Commercial Tensiometer for Triaxial Testing of Unsaturated Soils , 2006 .