Relationship between porosimetry measurement and soil—water characteristic curve for an unsaturated residual soil

Aung, K. K.; Rahardjo, H.; Leong, E. C.; Toll, D. G.

doi:10.1007/978-94-015-9775-3_9

Cited by 27 publications

(31 citation statements)

References 11 publications

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“…The PSD is an essential fabric element that has been used in geotechnical engineering applications and correlated with macroscopic properties, such as its dependency on the type of compaction for clays (Ahmed et al 1974;Kong et al 2005); the differences between laboratory and field-compacted soils for equivalent dry density and moulding water content (Prapaharan et al 1991;Jommi and Sciotti 2003); the saturated water permeability (GarciaBengochea et al 1979;Juang and Holtz 1986a, b;Lapierre et al 1990); frost-heave properties (Reed et al 1979); and qualitatively with macroscopic volume changes-consolidation- (Delage and Lefebvre 1984;Griffiths and Joshi 1989;Coulon and Bruand 1989;Tessier et al 1992;Qi et al 1996). Regarding unsaturated soils, MIP results have been used to predict the water retention properties (Prapaharan et al 1985;Romero et al 1999;Aung et al 2001;Simms andYanful 2002, 2005); as well as macroscopic volume changes due to the effects of mechanical and hydraulic paths (Al-Mukhtar 1995;Al-Mukhtar et al 1996;Qi et al 1996, Cui et al 2002Simms and Yanful 2004;Cuisinier and Laloui 2004;Lloret et al 2004;Romero et al 2005;Koliji et al 2006b;Hoffmann et al 2007). Observed correlations between the water retention, volume change, and water permeability in unsaturated soils with the PSD as measured by MIP are presented in this report.…”

Section: Introductionmentioning

confidence: 88%

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

2008

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With the advent of modern microstructural testing techniques and microstructure based constitutive models the microstructural characterisation of soils is gaining prominence. This paper reviews the history of microstructure investigation in unsaturated soils and discusses the engineering significance of this research to date. After a brief overview of the main microstructural techniques, the paper focuses on the evaluation of the current state of use and the development of two widely used techniques to study the microstructure of partially saturated soils, namely mercury intrusion porosimetry and the environmental scanning electron microscopy. The details of these techniques, their advantages and limitations, are first covered, followed by the presentation of selected test results. These results highlight the use of these techniques for understanding different hydro-mechanical behavioural features observed at macroscopic scale. Specifically, the paper shows the use of these techniques to explore the fundamental properties of water retention characteristics, water permeability, and micro and macrostructural interactions along different hydro-mechanical paths.

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Section: Introductionmentioning

confidence: 88%

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

2008

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“…Therefore, the shape of the SWCC is dependent upon the POSD of the soil. Some researchers attempted to obtain the SWCC through the POSD and capillary model (Prapaharan et al 1985;Olson 1985;Kong and Tan 2000;Aung, et al 2011;Beckett and Augarde 2013;Zeng, et al 2013). …”

Section: Introductionmentioning

confidence: 99%

Influence of drying–wetting cycles on soil-water characteristic curve of undisturbed granite residual soils and microstructure mechanism by nuclear magnetic resonance (NMR) spin-spin relaxation time (T₂) relaxometry

2018

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Due to the formational environment and climatic variability, granite residual soils with grain-size distribution ranging from gravel to clay undergo multiple drying–wetting cycles. The influences of multiple drying–wetting cycles on the soil-water characteristic curve (SWCC) and pore-size distribution (POSD) of undisturbed granite residual soils are investigated using the pressure plate test and nuclear magnetic resonance (NMR) spin-spin relaxation time (T2) distribution measurement, respectively. Results show that the water-retention capacity and air-entry value decrease and pores become more uniform with increasing drying–wetting cycles. After four drying–wetting cycles, the soil reaches a nearly constant state. The POSD change of multiple drying–wetting cycle samples is consistent with the SWCC of the soils. Furthermore, a modified van Genuchten model in terms of cumulative pore volume is used to obtain the best-fit POSD of the drying–wetting cycle samples. The shape and changing tendency of both curves of SWCC and POSD are quite similar and achieved a better correlation. It can be concluded that the SWCC is strongly dependent on the POSD of the soil and NMR T2 relaxometry can be used as an alternative to the assessment of microstructural variation of residual soils subjected to the periodic drying and wetting process.

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“…In remolded condition, soil has larger pores and therefore the suctions are lower than those measured in undisturbed specimen. This behavioral change is caused by structural changes since the relationship between pore size and suction is very strong as shown in [17,14,38].…”

Section: Discussionmentioning

confidence: 99%

“…Although there are many papers reporting the determination of soil-water retention curves (SWCC) for residual soils, most of them carried out test in compacted specimens [8][9][10][11][12][13] or undisturbed specimens only [14][15][16][17][18][19]7].…”

Section: Introductionmentioning

confidence: 99%

Influence of structure in the soil-water characteristic curves of two residual soils of granite

et al. 2016

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Abstract. This paper discusses the influence of structure in the soil-water characteristic curves (SWCC) of two residual soils of granite formed in a subtropical environment. One soil has a saprolitic nature (named GrSp) and the other shows lateritic behavior (named GrLt). Both materials occur on a slope which presents a extensive history of landslides in the municipality of São José, Southern Brazil. SWCC of undisturbed and remolded specimens were determined using the filter-paper technique. Undisturbed specimens were collected and remolded specimens were produced by static compression of disintegrated soil to the same void ratio and moisture content of undisturbed specimens. SWCC of saprolitic soil showed curves which were modelled as unimodal but the lateritic soil required the use of bimodal curves because of the structure developed in micro and macro levels. Suction levels measured in GrLt soil were higher than in saprolitic soil. Remolding process changed the levels of suction achieved, which is due to the structure and more specifically to the size of pores in the remolded soils. Hysteresis were verified in both materials, but were far more pronounced in the lateritic soil. Analysis of mercury intrusion porosimetry were carried out in GrSp soil. They showed that remolding generates a different pore distribution from the existing in the undisturbed soil.

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Relationship between porosimetry measurement and soil—water characteristic curve for an unsaturated residual soil

Cited by 27 publications

References 11 publications

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

Influence of drying–wetting cycles on soil-water characteristic curve of undisturbed granite residual soils and microstructure mechanism by nuclear magnetic resonance (NMR) spin-spin relaxation time (T₂) relaxometry

Influence of structure in the soil-water characteristic curves of two residual soils of granite

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Relationship between porosimetry measurement and soil—water characteristic curve for an unsaturated residual soil

Cited by 27 publications

References 11 publications

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

Microstructure Investigation in Unsaturated Soils: A Review with Special Attention to Contribution of Mercury Intrusion Porosimetry and Environmental Scanning Electron Microscopy

Influence of drying–wetting cycles on soil-water characteristic curve of undisturbed granite residual soils and microstructure mechanism by nuclear magnetic resonance (NMR) spin-spin relaxation time (T2) relaxometry

Influence of structure in the soil-water characteristic curves of two residual soils of granite

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Influence of drying–wetting cycles on soil-water characteristic curve of undisturbed granite residual soils and microstructure mechanism by nuclear magnetic resonance (NMR) spin-spin relaxation time (T₂) relaxometry