Abstract
The hydro-mechanical behaviour of compacted expansive Romainville clay was investigated. The soil was air-dried, crushed, and passed through a 2 mm sieve before being statically compacted to a dry density of 1.35 Mg/m3. The mechanical behaviour was investigated by tests in oedometer with controlled suction using the vapor equilibrium technique (suction s = 0, 9, 39, and 110 MPa). The vertical stress was applied in the range of 0–800 kPa. The experimental results are shown as follows: 1) wetting-induced swelling was higher at lower vertical stresses; 2) the vertical stress under which no swelling occurred during water flooding was estimated at 60 kPa, which can be considered as the swelling pressure of the soil tested; 3) the soil compressibility (changes of volume upon stress increases) was strongly influenced by the soil suction: the lower the suction, the higher the compressibility. The hydraulic behaviour was investigated using a large-scale inltration chamber (800 mm × 1000 mm in section and 1000 mm high). The large size of the soil column allowed burying the volumetric water content sensors (ThetaProbe) without signicantly affecting the water transfer and the soil swelling during inltration. The soil suction was monitored along the soil height (every 100 mm) using various relative humidity sensors and psychrometers. In the inltration test, water was kept on the soil surface and changes in suction and volumetric water content were monitored for 338 d. The wetting front has reached the bottom of the soil column at the end of the test. The data from the simultaneous monitoring of suction and water content were used to determine the water retention curve and the unsaturated hydraulic conductivity using the instantaneous prole method. It has been observed that the soil water retention curve depends on the soil depth; that is to be related to the soil depth-dependent swelling. The unsaturated hydraulic conductivity was found to be quite low, comprised between 3 × 10−11 m/s (at saturated state) and 10−14 m/s (at about 100 MPa suction).
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References
Fityus S G, Smith D W, Allman M A. Expansive soil test site near Newcastle. Journal of Geotechnical and Geoenvironmental Engineering, 2004, 130(7): 686–695
Ridley A M, Dineen K, Burland J B, Vaughan P R. Soil matrix suction: Some examples of its measurement and application in geotechnical engineering. Geotechnique, 2003, 53(2): 241–253
Abduljauwad S N, Al-Sulaimani G J, Basunbul I A, Al-Buraim I. Laboratory and field studies of response of structures to heave of expansive clay. Geotechnique, 1998, 48(1): 103–121
Alonso E E, Springman S M, Charles W W Ng. Monitoring large-scale tests for nuclear waste disposal. Geotechnical and Geological Engineering, 2008, 26(6): 817–826
Chapuis R P. The 2000 R.M. Hardy Lecture: Full-scale hydraulic performance of soil-bentonite and compacted clay liners. Canadian Geotechnical Journal, 2002, 39(2): 417–439
Delage P, Romero E. Geoenvironmental testing. Geotechnical and Geological Engineering, 2008, 26(6): 729–749
Romero E, Villar M V, Lloret A. Thermo-hydro-mechanical behaviour of heavily overconsolidated clays. Engineering Geology, 2005, 81: 255–268
Kassif G, Ben S A. Experimental relationship between swell pressure and suction. Geotechnique, 1971, 21: 245–255
Delage P, Suraj Da Silva G P R, Vicol T. Suction controlled testing of non-saturated soils with an osmotic consolidometer. In: Proceedings of the 7th Int. Conference on Expansive Soils. Dallas, 1992, 206–211
Delage P, Cui Y J. An evaluation of the osmotic method of controlling suction. Journal of Geomechanics and Geoengineering, 2008, 3(1): 1–11
Lloret A, Villar M V, Sanchez M, Gens A, Pintado X, Alonso E E. Mechanical behaviour of heavily compacted bentonite under high suction changes. Géotechnique, 2003, 53(1): 27–40
Alonso E E, Romero E, Hoffemann C, Garcia-Escudero E. Expansive bentonite/sand mixtures in cyclic controlled suction drying and wetting. Engineering Geology, 2003, 81: 213–226
Nowamooz H, Masrouri F. Hydromechanical behaviour of an expansive bentonite/silt mixture in cyclic suction-controlled drying and wetting tests. Engineering Geology, 2008, 101: 154–164
Cui Y J, Mantho A T, Cui K, Audiguier M. Water retention properties and volume change behaviour of natural romainville clay. In: Miller G A, Zapata C E, Houston S L, Fredlund D G, eds. Unsaturated Soils. ASCE, Reston, 2006: 873–882. VA 20191.4400
Audiguier M, Geremew Z, Laribi S, Cojean R. Caractérisation au laboratoire de la sensibilité au retrait-gonflement des sols argileux. Revue Franéaise de Géotechnique, 2007, 120–121: 67–82
Laribi S, Audiguier M, Cojean R. Assessing shrink/swell properties of two argillaceous soils from the Paris Basin: A comparison of cation exchange determination methods. Bulletin of Engineering Geology and the Environment, 2008, 67(3): 415–424
Ta A N, Tang A M, Cui Y J, Mantho A, Cui K. Propriétés de rétention et de compressibilité d’une argile naturelle gonflante. Journées Nationales de Géotechnique et de Géologie de l’Ingénieur JNGG’08-Nantes, 2008, 619–626
Daniel D E. Measurement of hydraulic conductivity of unsaturated soils with thermocouple psychrometers. Soil Science Society of America Journal, 1982, 46(6): 1125–1129
Chiu T F, Shackelford C D. Unsaturated hydraulic conductivity of compacted sand-kaolin mixtures. Journal of Geotechnical and Geoenvironmental Engineering, 1998, 124(2): 160–170
Bruckler L, Bertuzzi P, Angulo-Jaramillo R, Ruy S. Testing an inltration method for estimating soil hydraulic properties in the laboratory. Soil Science Society of America Journal, 2002, 66(2): 384–395
Cui Y J, Tang A M, Loiseau C, Delage P. Determining the unsaturated hydraulic conductivity of a compacted sand-bentonite mixture under constant-volume and free-swell conditions. Physics and Chemistry of the Earth, 2008, 33(Suppl 1): 462–471
Robinet J C, Rhattas M. Détermination de la perméabilité non saturée des matériaux argileux a faible porosité. Canadian Geotechnical Journal, 1995, 32(6): 1035–1043
Kröhn K P. Results and interpretation of bentonite resaturation experiments with liquid water and water vapour. In: Schanz T, ed. From Experimental Evidence towards Numerical Modeling of Unsaturated Soils. Berlin: Springer, 2003, 257–272
Kim D J, Jaramillo R A, Vauclin M, Feyen J, Choi S I. Modeling of soil deformation and water flow in a swelling soil. Geoderma, 1999, 92(3–4): 217–238
Lemaire T, Moyne C, Stemmelen D. Imbibition test in a clay powder (MX-80 bentonite). Applied Clay Science, 2004, 26(1–4): 235–248
Masrouri F, Bicalho K, Kawai K. Laboratory Hydraulic Testing in Unsaturated Soils. Geotechnical and Geological Engineering, 2008, 26(6): 691–704
Meerdink J S, Benson C H, Khire M V. Unsaturated hydraulic conductivity of two compacted barrier soils. Journal of Geotechnical Engineering, ASCE, 1996, 122(7): 565–576
Stormont J C, Anderson C E. Capillary barrier effect from underlying coarser soil layer. Journal of Geotechnical and Geoenvironmental Engineering, 1999, 125(8): 641–648
Choo L P, Yanful E K. Water flow through cover soils using modeling and experimental methods. Journal of Geotechnical and Geoenvironmental Engineering, 2000, 126(4): 324–334
Yang H, Rahardjo H, Wibawa B, Leong E C. A soil column apparatus for laboratory inltration study. Geotechnical Testing Journal, 2004, 27(4): 347–355
Delage P, Howat M D, Cui Y J. The relationship between suction and swelling properties in a heavily compacted unsaturated clay. Engineering Geology, 1998, 50(1–2): 31–48
Tang A M, Cui Y J. Controlling suction by the vapour equilibrium technique at different temperatures and its application in determining the water retention properties of MX80 clay. Canadian Geotechnical Journal, 2005, 42(1): 287–296
Basma A A, Al-Homoud A S, Husein A. Laboratory assessment of swelling pressure of expansive soils. Applied Clay Science, 1995, 9(5): 355–368
Wescor. PSYPRO Water Potential System Users Manual. UT 84321-5294 USA, 2004
Ye W M, Cui Y J, Qian L X, Chen B. An experimental study of the water transfer through compacted GMZ bentonite. Engineering Geology, 2009, 108: 169–176
Gens A, Alonso E E. A framework for the behaviour of unsaturated expansive clays. Canadian Geotechnical Journal, 1992, 29(6): 1013–1032
Tang A M, Cui Y J, Barnel N. Thermo-mechanical behaviour of a compacted swelling clay. Géotechnique, 2008, 58(1): 45–54
Cui Y J, Loiseau C, Delage P. Microstructure changes of a conned swelling soil due to suction controlled hydration. In: Jucá J F T, de Campos T M P, Marinho F A M, eds. Unsaturated Soils. In: Proceedings of 3rd International Conference on Unsaturated Soils (UNSAT 2002). Lisse: Swets & Zeitlinger, 2002, 2: 593–598
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Cui, Y., Ta, A.N., Tang, A.M. et al. Investigation of the hydro-mechanical behaviour of compacted expansive clay. Front. Archit. Civ. Eng. China 4, 154–164 (2010). https://doi.org/10.1007/s11709-010-0019-0
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DOI: https://doi.org/10.1007/s11709-010-0019-0