Microstructure investigation in unsaturated soils: A review with special attention to contribution of mercury intrusion porosimetry and environmental scanning electron microscopy

Geotechnical and Geological Engineering

Volumn 26, Issue 6, 2008, Pages 705-727

  Romero, Enrique ^a   Simms, Paul H ^b  

^a UNIVERSITAT POLITÈCNICA DE CATALUNYA   (Spain)

^b CARLETON UNIVERSITY   (Canada)

Author keywords

Environmental scanning electron microscopy; Mercury intrusion porosimetry; Microstructure; Pore size distribution; Suction; Unsaturated soil

Indexed keywords

ELECTRON MICROSCOPES; ENGINEERING RESEARCH; GEOLOGIC MODELS; MECHANICAL PERMEABILITY; MECHANICAL PROPERTIES; MERCURY (METAL); MICROSCOPIC EXAMINATION; MICROSTRUCTURE; PORE SIZE; SCANNING; SCANNING ELECTRON MICROSCOPY; SOILS; TESTING;

ENVIRONMENTAL SCANNING ELECTRON MICROSCOPY; MERCURY INTRUSION POROSIMETRY; PORE SIZE DISTRIBUTION; SUCTION; UNSATURATED SOIL;

SOIL TESTING;

CONSTITUTIVE EQUATION; HYDROMECHANICS; MERCURY (ELEMENT); MICROSTRUCTURE; PERMEABILITY; POROSITY; SCANNING ELECTRON MICROSCOPY; SOIL WATER; SUCTION; UNSATURATED MEDIUM; WATER RETENTION;

EID: 56349140666     PISSN: 09603182     EISSN: None     Source Type: Journal    
DOI: 10.1007/s10706-008-9204-5     Document Type: Review

References (143)

1. Abell AB, Willis KL, Lange DA (1999) Mercury intrusion porosimetry and image analysis of cement-based materials. J Colloid Interface Sci 211:39-44
2. Agus SS, Schanz T (2005) Effect of shrinking and swelling on microstructures and fabric of a compacted bentonite-sand mixture. In: H. Bilsel, Z. Nalbantoglu (eds) Proceedings of International Conference on Problematic Soils GEOPROB 2005, Famagusta, vol 2. Eastern Mediterranean University Press, Famagusta, pp 543-550, 25-27 May 2005
3. Ahmed S, Lovell CW, Diamond S (1974) Pore sizes and strength of compacted clay. J Geotech Eng Div ASCE 100(4):407-425
4. Airò Farulla C, Jommi C (2005) Suction controlled wetting-drying cycles on a compacted scaly clay. In: Bilsel H, Nalbantoglu Z (eds) Proceedings of International Conference on Problematic Soils GEOPROB 2005, Famagusta, vol 1. Famagusta, Eastern Mediterranean University Press, pp 229-237, 25-27 May 2005
5. Aït-Mokhtar A, Amiri O, Dumargue P, Bouguerra A (2004) On the applicability of Washburn law: Study of mercury and water flow properties in cement-based materials. Mater Struct 37:107-113
6. Al-Mukhtar M (1995) Macroscopic behaviour and microstructural properties of a kaolinite clay under controlled mechanical and hydraulic state. In: Alonso EE, Delage P (eds) Proceedings of 1st International Conference on Unsaturated Soils, Paris, vol 1. Balkema, Presses des Ponts et Chaussées, pp 3-9
7. Al-Mukhtar M Belanteur N Tessier D., Vanapalli SK (1996) The fabric of clay soil under controlled mechanical and hydraulic stresses. Appl Clay Sci 11(2-4):99-115
8. Alonso EE, Vaunat J, Gens A (1999) Modelling the mechanical behaviour of expansive clays. Eng Geol 54:173-183
9. Alonso EE, Romero E, Hoffmann C, García-Escudero E (2005) Expansive bentonite-sand mixtures in cyclic controlled-suction drying and wetting. Eng Geol 81(3):213-226
10. Al-Rawas AA, McGown A (1999) Microstructure of Omani expansive soils. Can Geotech J 36:272-290
11. Aung KK, Rahardjo H, Leong EC, Toll DG (2001) Relationship between porosimetry measurement and soil-water characteristic curve for an unsaturated residual soil. Geotech Geol Eng 19:401-416
12. Baker JM, Allmaras RR (1990) System for automating and multiplexing soil moisture measurement by time-domain reflectometry. Soil Sci Soc Am J 54(1):1-6
13. Baker JC, Grabowska-Olszewska B, Uwins PJR (1995) ESEM study of osmotic swelling of bentonite from Radzionkow (Poland). Appl Clay Sci 9:465-469
14. Barden L (1973) Macro and microstructure of soils. In: Pusch R. (ed). Proceedings of International Symposium on Soil Structure. Goteborg (Sweden),vol 1. Swedish Geotechnical Institute, Stockholm, pp 21-26
15. Barden L, Sides GR (1970) Engineering behavior and structure of compacted clay. J Soil Mech Found Div ASCE 96(4):1171-1200
16. Barden L, McGown A, Collins K (1973) The collapse mechanism in partly saturated soil. Eng Geol 7(1):49-60
17. Bennet RH, Bryant WR, Hulbert MH (eds). (1991) Microstructure of fine-grained sediments. From mud to shale. Springer-Verlag, New York
18. Ben Rhaim H, Tessier D, Pons CH, Amara BH (1998) Evolution of the microstructure of interstratified Ca-saturated clays during dehydration: SAXS and HRTEM analysis. Clay Miner 33:619-628
19. Berkowitz B, Ewing RP (1998) Percolation theory and network modeling applications in soil physics. Surveys in Geophysics 19:23-72
20. Bésuelle, P., Viggiani G, Lenoir N, Desrues J, Bornert M (2006) X-ray micro CT for studying strain localization in clay rocks under triaxial compression. In: Desrues J, Viggiani G, Bésuelle P (eds) Advances in X-ray tomography for geomaterials. ISTE Ltd, London, UK, 35-52
21. Bogner A, Jouneau P-H., Thollet G, Basset D, Gauthier C (2006) A history of scanning electron microscopy developments: Towards "wet-STEM" imaging. Micron 38(4):390-401
22. Borsic A, Comina C, Foti S, Lancellotta R, Musso G (2005) Imaging heterogeneities with electrical impedance tomography: Laboratory results. Géotechnique 55(7):539-547
23. Buckman JO, Todd AC, Hill PI (2000) Observations on reservoir rock wettability using an environmental scanning electron microscope. Microsc Anal 35-37
24. Carminati A, Kaestner A, Hassanein R, Koliji A (2006) Hydraulic properties of aggregate-aggregate contacts. In: Desrues J, Viggiani G, Bésuelle P (eds.) Advances in X-ray tomography for geomaterials. ISTE Ltd, London, UK, pp 325-331
25. Cases JM, Beraend I, Besson G, Francois M, Uriot JP, Thomas F, Poirer JE (1992) Mechanism of adsorption and desorption of water vapor by homoionic montmorillonite I. The sodium exchanged form. Langmuir 8:2730-2739
26. Chiappone A, Marello S, Scavia C, Setti M (2004) Clay mineral characterization through the methylene blue test: Comparison with other experimental techniques and applications of the method. Can Geotech J 41:1168-1178
27. Collins K, McGown A, Barden L (1973) Microstructural features of some Israeli expansive soils. Proceedings of 3rd International Conference Expansive Soils, Haifa, Israel, pp 27-34
28. Collins K, McGown A (1974) The form and function of microfabric features in a variety of natural soils. Gétechnique 24(2):223-254
29. Comina C, Foti S, Musso G, Romero E (2008) EIT oedometer - an advanced cell to monitor spatial and time variability in soil. Geotech Test J (Accepted for publication)
30. Coulon E, Bruand A (1989) Effects of compaction on the pore space geometry in sandy soils. Soil Tillage Res 15:137-152
31. Cui YJ, Loiseau C, Delage P (2002) Microstructure changes of a confined swelling soil due to suction controlled hydration. Proceedings of 3rd International Conference on Unsaturated Soils, Recife, Brazil,. In: Jucá JFT, de Campos TMP, Marinho FAM (eds) Unsaturated Soils, vol 2. A.A. Balkema Publishers, Lisse, pp 593-598, 10-13 March 2002
32. Cuisinier O, Laloui L (2004) Fabric evolution during hydromechanical loading of a compacted silt. Int J Numer Anal Meth Geomech 28(6):483-499
33. Cuisinier O, Masrouri F (2005) Compressibility and fabric of an unsaturated compacted swelling soil. Proceedings of International Symposium on Advanced Experimental Unsaturated Soil Mechanics, Trento, Italy, 27-29 June 2005. In: Tarantino A, Romero E, Cui YJ (eds). Advanced Experimental Unsaturated Soil Mechanics. Taylor, Francis Group, London, pp 411-417
34. Danilatos GD (1993) Introduction to the ESEM instrument. Microsc Res Tech 25:354-361
35. Delage P (2006) Some microstructure effects on the behaviour of compacted swelling clays used for engineered barriers. Chin J Rock Mech Eng 25(4):721-732
36. Delage P (2007) Microstructure features in the behaviour of engineered barriers for nuclear waste disposal. In: Schanz T (ed) Experimental unsaturated soil mechanics. Springer Proceedings in Physics, vol 112. Springer, Berlin, pp 11-32
37. Delage P, Cui YJ (2007) Microstructure effects on the hydration and water transport in compacted bentonites used for radiactive waste disposal. In: Yin Z, Yuan J, Chiu ACF (eds) Proceedings of 3rd Asian Conference on Unsaturated Soils, Nanjing PR China, Science Press, Beijing, pp 85-96, April 2007
38. Delage P, Graham J (1996) Mechanical behaviour of unsaturated soils: understanding the behaviour of unsaturated soils requires reliable conceptual models. In: Alonso EE, Delage P (eds) Proceedings of 1st International Conference on Unsaturated Soils, Paris vol 3. Balkema, Presses des Ponts et Chaussées, pp 1223-1256
39. Delage P, Lefebvre G (1984) Study of the structure of a sensitive Champlain clay and of its evolution during consolidation. Can Geotech J 21:21-35
40. Delage P, Pellerin M (1984) Influence de la lyophilisation sur la structure d'une argile sensible du Quebec. Clay Miner 19:151-160
41. Delage P, Tessier D, Audiguier MM (1982) Use of the cryoscan apparatus for observation of freeze-fractured planes of a sensitive Quebec clay in scanning electron microscopy. Can Geotech J 19:111-114
42. Delage P, Audiguier M., Cui YJ, Howatt MD (1996) Microstructure of a compacted silt. Can Geotech J 33:150-158
43. De las Cuevas C (1997) Pore structure characterization in rock salt. Eng Geol 47:17-30
44. Desrues J, Viggiani G, Bésuelle P (eds) (2006) Advances in X-ray tomography for geomaterials. ISTE Ltd, London, UK
45. Diamond S (1970) Pore size distribution in clays. Clays Clay Miner 18:7-23
46. Djeran-Maigre I, Tessier D, Grundberger D, Velde B, Vasseur G (1998) Evolution of microstructure and of macroscopic properties of some clays during experimental compaction. Mar Petrol Geol 15:109-128
47. Fadeev AYu., Borisova OR, Lisichkin GV (1996) Fractality of porous silicas: A comparison of adsorption and porosimetry data. J Colloid Interface Sci 183:1-5
48. Fernández AM, Rivas P (2005) Analysis and distribution of waters in the compacted FEBEX bentonite: Pore water chemistry and adsorbed water properties. Proceedings of International Symposium on Large Scale Field Tests in Granite, Sitges, Spain, 12-14th November 2003. In: Alonso EE, Ledesma A (eds) Advances in understanding engineered clay barriers. Taylor, Francis Group, London, pp 257-275
49. Fies JC, Bruand A (1998) Particle packing and organization of the textural porosity in clay-silt-sand mixtures. Eur J Soil Sci 49:557-567
50. Fukue M, Minato T, Horibe H, Taya N (1999) The micro-structure of clay given by resistivity measurements. Eng Geol 54:43-53
51. Garcia-Bengochea I, Lovell W, Altshaeffl AG (1979) Pore distribution and permeability of silty clays. J Geotech Eng ASCE 105(7):839-856
52. Gasc-Barbier M, Tessier D (2007) Structural modifications of a hard deep clayey rock due to hygro-mechanical solicitations. Int J Geomech 7(3):227-235
53. Gebrenegus T, Tuller M-, Muhuthan B (2006) The application of X-ray computed tomography for characterisation of surface crack networks in bentonite-sand mixtures. In: Desrues J, Viggiani G, Bésuelle P (eds) Advances in X-ray tomography for geomaterials. ISTE Ltd, London, UK: 207-212
54. Giménez D., Perfect E, Rawls WJ, Pachepsky Ya (1997) Fractal models for predicting soil hydraulic properties: A review. Eng Geol 48: 161-183
55. Gillott JE (1970) Fabric of Leda clay investigated by optical, electron-optical, and x-ray diffraction methods. Eng Geol 4(2):133-153
56. Gillott JE (1979) Fabric, composition and properties of sensitive soils from Canada, Alaska and Norway. Eng Geol 14(2):149-172
57. Grabowska-Olszewska B (1975) SEM analysis of microstructures of loess deposits. Bull Eng Geol Environ 11(1):45-48
58. Griffiths FJ, Joshi RC (1989) Changes in pore size distribution due to consolidation of clays. Géotechnique 39(1):159-167
59. Hetzel F, Tessier D, Jaunet A-M., Doner H (1994) The microstructure of three Na+ Smectites: The importance of particle geometry on dehydration and rehydration. Clays Clay Miner 42(1):242-248
60. Hoffman R (1975) A study of the advancing interface. Interface shape in liquid-gas systems. J Colloid Interface Sci 50:228-241
61. Hoffmann C, Alonso EE, Romero E (2007) Hydro-mechanical behaviour of bentonite pellet mixtures. Phys Chem Earth 32:832-849
62. Jenkins LM, Donald AM (2000) Observing fibers swelling in water with an environmental scanning electron microscope. Textile Res J 70:269-276
63. Jommi C, Sciotti A (2003) A study of the microstructure to assess the reliability of laboratory compacted soils as reference material for earth constructions. In: Botempi F (ed) System-based vision for strategic and creative design, vol 3. A.A. Balkema, Lisse, pp 2409-2415
64. Juang CH, Holtz RD (1986a) Fabric, pore size distribution and permeability of sandy soils. J Geotech Eng ASCE 112(9): 855-868
65. Juang CH, Holtz RD (1986b) A probabilistic permeability model and the pore size density function. Int J Numer Anal Meth Geomech 10:543-553
66. Katti DR, Shanmugasundaram V (2001) Influence of swelling on the microstructure of expansive clays. Can Geotech J 38:175-182
67. Koliji A, Carminati A, Kaestner A, Vulliet L, Laloui L, Fluehler H, Vontobel P, Hassanein R (2006a) Experimental study of flow and deformation in aggregated soils using neutron tomography. In: Desrues J, Viggiani G, Bésuelle P (eds). Advances in X-ray tomography for geomaterials. ISTE Ltd, London, UK pp 341-348
68. Koliji A, Laloui L, Cuisinier O, Vulliet L (2006b) Suction induced effects on the fabric of a structured soil. Trans Porous Med 64:261-278
69. Komine H, Ogata N (1996) Observation of swelling behaviour of bentonite by new electron microscope. In: Proceedings of 2nd International Conference on Environmental Geotechnics (IS-Osaka '96), vol. 1, pp 563-568
70. Komine H, Ogata N (1999) Experimental study on swelling characteristics of sand-bentonite mixture for nuclear waste disposal. Soils Found 39(2):83-97
71. Komine H, Ogata N (2004) Predicting swelling characteristics of bentonites. J Geotech Geoenviron Eng ASCE 130(8):818-829
72. Kong LW, Guo AG, Zhao YW, Liu YY (2005) Influence of moisture content on porosity features of Red clay. Proceedings International Symposium on Advanced Experimental Unsaturated Soil Mechanics, Trento, Italy, 27-29 June 2005. In: Tarantino A, Romero E, Cui YJ (eds) Advanced experimental unsaturated soil mechanics. Taylor, Francis Group, London, pp 419-424
73. Korvin G (1992) Fractal models in the earth sciences. Elsevier, Amsterdam
74. Lambe TW (1958) The structure of compacted clays. J Soil Mech Found Div ASCE 84(2):1-34
75. Lapierre C Leroueil S, Locat J (1990) Mercury intrusion and permeability of Louisville clay. Can Geotech J 27:761-773
76. Lawrence GP (1978) Stability of soil pores during mercury intrusion porosimetry. J Soil Sci 29:299-304
77. Leong EC, Rahardjo H (1997) Permeability functions for unsaturated soils. J Geotech Eng ASCE 123(12):1118-1126
78. Loret B, Khalili N (2000) A three phase model for unsaturated soils. Int J Numer Anal Method Geomech 24(11):883-927
79. Lloret A, Romero E, Villar MV (2004) FEBEX II Project. Final report on thermo-hydro-mechanical laboratory tests. Ref. PT-10/04. ENRESA, Dirección de Ciencia y Tecnología, Madrid. Available on-line at: http://www.enresa.es/
80. Lloret A, Villar MV (2007) Advances on the knowledge of the thermo-hydro-mechanical behaviour of heavily compacted FEBEX bentonite. Phys Chem Earth 32:701-715
81. Marshall TJ (1958) A relation between hydraulic conductivity and size distribution of pores. J Soil Sci 9:1-8
82. Matthews GP, Ridgway CJ, Spearing MC (1995) Void space modelling of mercury intrusion hysteresis in sandstone, paper coating, and other porous media. J Colloid Interface Sci 171:8-27
83. McGown A, Collins K (1975) The microfabrics of some expansive and collapsing soils. Proceedins of 5th Panamerican Conference, vol 1 Soil Mechanics and Foundation Engineering, Buenos Aires, pp 323-332
84. Meyer K, Lorenz P, Böhl-Kuhn B, Klobes P (1994) Porous solids and their characterization. Methods of investigation and application. Cryst Res Technol 29(7):903-930
85. Mitchell JK, Soga K (2005) Fundamentals of soil behaviour, 3rd edn. John Wiley, Sons, Inc, New Jersey
86. Montes-H G (2002) Etude expérimentale de la sorption d'eau et du gonflement des argiles par microscopie électronique à balayage environnementale (ESEM) et analyse digitale d'images. PhD Thesis. Louis Pasteur University, Strasbourg I, France
87. Montes-H G, Duplay J, Martinez L, Mendoza C (2003a) Swelling-shrinkage kinetics of MX80 bentonite. Appl Clay Sci 22:279-293
88. Montes-H G, Duplay J, Martinez L, Geraud Y, Rousset-Tournier B (2003b) Influence of interlayer cations on the water sorption and swelling-shrinkage of MX80 bentonite. Appl Clay Sci 23:309-321
89. Montes-H G., Duplay J, Martinez L, Escoffier S, Rousset D (2004) Structural modifications of Callovo-Oxfordian argillite under hydration/ dehydration conditions. Appl Clay Sci 25:187-194
90. Moro F, Böhni H (2002) Ink-bottle effect in mercury intrusion porosimetry of cement-based materials. J Colloid Interface Sci 246:135-149
91. Mualem Y (1976) A new model for predicting the hydraulic conductivity of unsaturated porous media. Water Resour Res 12:513-522
92. Mukunoki T, Otani J, Maekawa A, Camp S, Gourc JP (2006) Investigation of crack behaviour on cover soils at landfill using X-ray CT. In: Desrues J, Viggiani G, Bésuelle P (eds) Advances in X-ray tomography for geomaterials. ISTE Ltd, London, UK, pp 213-219
93. Muñoz JJ (2007) Thermo-hydro-mechanical analysis of soft rock. Application to a large scale heating test and large scale ventilation test. Ph. D. Thesis, Universitat Politècnica de Catalunya, Barcelona. http://www.tdcat.cesca.es/TDX-0511107-103122/
94. Musso G, Romero E, Gens A, Castellanos E (2003). The role of structure in the chemically induced deformations of Febex bentonite. Appl Clay Sci 23:229-237
95. Olivella S, Carrera J, Gens A, Alonso EE (1994). Nonisothermal multiphase flow of brine and gas through saline media. Trans Porous Med 15:271-293
96. Osipov VI, Sokolov VN (1978a) A study of the nature of the strength and deformation properties of clay soils with the help of the scanning electron microscope. Bull Eng Geol Environ 17(1):91-94
97. Osipov VI, Sokolov VN (1978b) Relation between the microfabric of clay soils and their origin and degree of compaction. Bull Eng Geol Environ 18(1):73-81
98. Osipov VI, Sokolov VN (1978c) Structure formation in clay sediments. Bull Eng Geol Environ 18(1):83-90
99. Penumadu D, Dean J (2000) Compressibility effect in evaluating the pore-size distribution of kaolin clay using mercury intrusion porosimetry. Can Geotech J 37:393-405
100. Prapaharan S, Altschaeffl AG, Dempsey BJ (1985) Moisture curve of a compacted clay: Mercury intrusion method. J Geotech Eng ASCE 111(9):1139-1143
101. Prapaharan S, White DM, Altschaeffl AG (1991) Fabric of field- and laboratory-compacted clay. J Geotech Eng ASCE 117(12):1934-1940
102. Pusch R (1970) Microstructural changes in soft quick clay at failure. Can Geotech J 7:1-7
103. Pusch R (1999) Experience from preparation and investigation of clay microstructure. Eng Geol 54:187-194
104. Pusch R, Schomburg J (1999) Impact of microstructure on the hydraulic conductivity of undisturbed and artificially prepared smectite clay. Eng Geol 54:167-172
105. Pusch R, Yong RN, Grindrod P (eds) (1999) Special issue. Microstructural modelling with special emphasis on the use of clays for waste isolation. Eng Geol 54
106. Pusch R, Yong RN (eds) (2003) Special issue. Clay microstructure. Proceedings of Workshop Lund, Sweden. Applied Clay Science, vol 23, Issues 1-4, 15-17 October, 2002
107. Qi Y Al-Mukthar M, Alcover JF, Bergaya F (1996) Coupling analysis of macroscopic and microscopic behaviour in highly consolidated Na-laponite clays. Appl Clay Sci 11:185-197
108. Reed MA, Lovell CW, Altschaeffl AG, Wood LE (1979) Frost-heaving rate predicted from pore-size distribution. Can Geotech J 16:463-472
109. Rodríguez-Rey A, Ruiz de Argandoña VG, Calleja L, Suárez del Río LM, Velorio C (2006) Consolidants influence on sandstone capillarity. X-ray study. In: Desrues J, Viggiani G, Bésuelle P (eds) Advances in X-ray tomography for geomaterials. ISTE Ltd, London, UK pp 381-387
110. Rolland S, Stemmelen D, Moyne C, Masrouri F (2003) Transfert hydrique dans un sol argileux gonflant non saturé: Influence du confinement. Rev Fr Géotech 104:21-35
111. Rolland S, Stemmelen D, Moyne C, Masrouri F (2005) Experimental hydraulic measurements in an unsaturated swelling soil using the dual-energy gamma-ray technique. Proceedings of International Symposium on Advanced Experimental Unsaturated Soil Mechanics, Trento, Italy. In: Tarantino A, Romero E, Cui YJ (eds) Advanced experimental unsaturated soil mechanics. Taylor, Francis Group, London, pp 305-310, 27-29 June 2005
112. Romero E (1999) Characterisation and thermo-hydro-mechanical behaviour of unsaturated Boom-clay: An experimental study. Ph. D. Thesis, Universitat Politècnica de Catalunya, Barcelona. http://www.tdcat.cesca.es/TDCat-0930102-092135/
113. Romero E, Gens A, Lloret A (1999) Water permeability, water retention and microstructure of unsaturated Boom clay. Eng Geol 54:117-127
114. Romero E, Hoffmann C, Castellanos E, Suriol J, Lloret A (2005) Microstructural changes of compacted bentonite induced by hydro-mechanical actions. Proceedings of International Symposium on Large Scale Field Tests in Granite, Sitges, Spain. In: Alonso EE, Ledesma A (eds) Advances in understanding engineered clay barriers. Taylor, Francis Group, London, pp 193-202, 12-14th November 2003
115. Saiyouri N, Hicher PY, Tessier D (1998) Microstructural analysis of highly compacted clay swelling. Proceedings of 2nd International Conference on Unsaturated Soils, Beijing, vol 1. International Academic Publishers, Beijing, pp 119-124
116. Saiyouri N, Hicher PY, Tessier D (2000) Microstructural approach and transfer water modelling in highly compacted unsaturated swelling clays. Mech Cohes Frict Mater 5(1):41-60
117. Saiyouri N, Tessier D, Hicher PY (2004) Experimental study of swelling in unsaturated compacted clays. Clay Miner 39(4):469-479
118. Sánchez M., Gens A, Guimarães L., Olivella S (2005) A double structure generalized plasticity model for expansive materials. Int J Numer Anal Method Geomech 29:751-787
119. Santamarina JC, Klein KA, Wang YH, Prencke E (2002) Specific surface: determination and relevance. Can Geotech J 39:233-241
120. Simms PH (2004) Appropriate use of the indirect methods to predict unsaturated hydraulic conductivity. Geotech News 22(2):34-36
121. Simms PH, Yanful EK (2001) Measurement and estimation of pore shrinkage and pore distribution in a clayey till during soil-water characteristic curve tests. Can Geotech J 38:741-754
122. Simms PH, Yanful EK (2002) Predicting soil-water characteristic curves of compacted plastic soils from measured pore-size distributions. Géotechnique 52(4):269-278
123. Simms PH, Yanful EK (2004) A discussion of the application of mercury intrusion porosimetry for the investigation of soils, including an evaluation of its use to estimate volume change in compacted clayey soils. Géotechnique 54(6):421-426
124. Simms PH, Yanful EK (2005) A pore-network model for hydromechanical coupling in unsaturated compacted clayey soils. Can Geotech J 42:499-514
125. Sills ID, Aylmore LAG., Quirk JP (1973) A comprison between mercury injection and nitrogen sorption as methods of determining pore size distribution. Proc Soil Sci Soc Am 37:535-537
126. Suzuki S, Prayongphan S, Ichikawa Y, Chae B-G (2005) In situ observations of the swelling of bentonite aggregates in NaCl solution. Appl Clay Sci 29:89-98
127. Takahashi M, Takemura T, Hirai H, Murakoshi A, Kato M (2006) Spatial and density resolution in microfocus X-ray CT applied to studies of microstructural changes in rocks with increasing hydrostatic pressure. In: Desrues J, Viggiani G, Bésuelle P (eds) Advances in X-ray tomography for geomaterials. ISTE Ltd, London, UK, pp 421-427
128. Tessier D, Lajudi A, Petit JC (1992) Relation between the macroscopic behaviour of clays and their microstructural properties. Appl Geochem 1(Suppl):151-161
129. Thiel BL, Donald AM (1998) In situ mechanical testing of fully hydrated carrots in the environmental SEM. Ann Bot 82:727-733
130. Thom R, Sivakumar R, Sivakumar V., Murray EJ, Mackinnon P (2007) Pore size distribution of unsaturated compacted kaolin: The initial states and final states following saturation. Géotechnique 57(5):469-474
131. Tovey NK (1973) Quantitative analysis of electron micrographs of soil structure. In: Pusch GR (ed) Proceedins of International Symposium on Soil Structure, vol 1. Swedish Geotechnical Institute, Stockholm, pp 50-57
132. Tovey NK, Krinsley DH (1975) A technique to enhance detail on scanning electron micrographs of geological materials. Géotechnique 25(1):146-151
133. Tovey NK, Frydman S, Wong KY (1973) A study of swelling clay in the scanning electron microscope. Proceedings of 3rd International Conference. Expansive Soils Haifa Israel, vol 2. pp 45-54
134. Van Geet M., Volckaert G., Roels S (2005) The use of microfocus X-ray computed tomography in characterising the hydration of a clay pellet/ powder mixture. Appl Clay Sci 29:73-87
135. Van Genutchen MT (1980) A closed form solution for predicting the hydraulic conductivity of unsaturated soils. Soil Sci Soc of Am J 44:892-898
136. Villar MV, Lloret A (2001) Variation of the intrinsic permeability of expansive clays upon saturation. In: Adachi K, Fukue M (eds) Clay Science for Engineering. A.A. Balkema, Rotterdam, pp 259-266
137. Viola R, Tuller M, Or D, Drasdis J (2005) Microstructure of clay-sand mixtures at different hydration states. Proceedings of International Symposium on Advanced Experimental Unsaturated Soil Mechanics, Trento, Italy,. In: Tarantino A, Romero E, Cui YJ (eds) Advanced experimental unsaturated soil mechanics. Taylor, Francis Group, London, pp 437-442, 27-29 June 2005
138. Wan AWL, Gray MN, Graham J (1995) On the relations of suction, moisture content and soil structure in compacted clays. In: Alonso EE, Delage P (eds) Proceeedings of 1st International Conference on Unsaturated Soils, Paris, vol 1. Balkema, Presses des Ponts et Chaussées, pp 215-222
139. Watt GR, Griffin BJ, Kinny PD (2000) Charge contrast imaging of geological materials in the environmental scanning electron microscope. Am Miner 85:1784-1794
140. Webb PA, Orr C (1997) Analytical methods in fine particle technology. Micromeritics Instrument Corp, Norcross
141. Wei QF, Wang XQ (2003) Dynamic characterisation of industrial textiles using an environmental scanning electron microscope. J Indust Text 33(2):101-110
142. Wilson GW, Fredlund DG, Barbour SL (1994) Coupled soil-atmosphere modeling for soil evaporation. Can Geotech J 31:151-161
143. Zhang G, Germaine JT, Whittle AJ (2005) Drying induced alteration to the microstructure of a tropical soil. Proceedings of International Symposium on advanced experimental unsaturated soil mechanics, Trento, Italy. In: Tarantino A, Romero E, Cui YJ (eds) Advanced experimental unsaturated soil mechanics. Taylor & Francis Group, London, pp 443-449, 27-29 June 2005