Water retention characteristics of swelling clays in different compaction states

Iyer, Kannan K. R.; Joseph, Jeevan; Lopes, Bruna de Carvalho Faria Lima; Singh, Devendrá; Tarantino, Alessandro

doi:10.1080/17486025.2017.1396363

Cited by 11 publications

(2 citation statements)

References 50 publications

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“…e microstructure of soil has significant influence on the shape and hysteresis of the SWCC [23,[30][31][32]. By using equation (1) [33], the pore diameter can be converted to equivalent matric suction, then the SWCC and pore size (converted to matric suction) density function can be plotted in one Figure (Figure 14) to better explain the effect of microstructure on SWCC.…”

Section: Effect Of Microstructure On Swccsmentioning

confidence: 99%

Microstructure of Compacted Loess and Its Influence on the Soil‐Water Characteristic Curve

Xie

Hou

et al. 2020

Advances in Materials Science and Engineering

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Soil-water characteristic curve (SWCC) is a key constitutive relationship for studying unsaturated soil, and as is known, microstructure of the soil has great influence on the mechanical behaviour of the soil. In this study, the wetting and drying soil-water characteristic curves (SWCCs) of loess compacted at three different water contents were measured using the filter paper method. And microproperties of compacted loess were obtained by the mercury intrusion method (MIP) and scanning electron microscope (SEM). Results show that the compaction water contents have significant influence on the SWCC and microstructure. The pore size distribution (PSD) curves have great differences in macropore range and are similar in micropore range. Loess compacted at optimum and dry of optimum are generally connected, while there are certain number of nonintruded pores in loess compacted at wet of optimum. The SWCC curves vary significantly in low suction (ua − uw < 1000 kPa) and tend to converge together in high suction (ua − uw ≥ 1000 kPa). Hysteresis in the SWCCs is more obvious for loess compacted at optimum and dry of optimum in the matric suction of 0∼100 kPa; however, there is a pronounced hysteresis for loess compacted at wet of optimum in full matric suction range. The characteristic of the SWCCs including their hysteresis can be well interpreted from the loess microstructure.

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Section: Effect Of Microstructure On Swccsmentioning

confidence: 99%

Microstructure of Compacted Loess and Its Influence on the Soil‐Water Characteristic Curve

Xie

Hou

et al. 2020

Advances in Materials Science and Engineering

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“…Early retention models postulated a simple unique relationship between degree of saturation (or volumetric water content) and capillary suction [4,12,46]. Subsequent studies have, however, highlighted that water retention is also markedly influenced by the characteristics of the pore network [3,13,19,21,22,30,37]. For example, soils compacted dry of optimum exhibit two distinct pore classes, namely a class of smaller intra-aggregate pores and a class of larger inter-aggregate pores, whose size and volume evolve with stress history.…”

Section: Introductionmentioning

confidence: 99%

A methodology for the formulation of water retention models in deformable soils

Gallipoli

Bruno

2021

Acta Geotech.

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This paper presents a novel approach to soil–water retention modelling that is based on the analysis of the material pore network. The approach postulates the existence of a differential coupling function, which relates the variation of water ratio to the variation of void ratio at constant suction. Distinct differential coupling functions have been considered, and the most general option has been integrated in a closed-form relationship between water ratio and void ratio with a suction-dependent integration constant, whose expression describes the isochoric retention behaviour. Four alternative expressions of the suction-dependent integration constant have been proposed resulting in four different, but equivalent, models linking degree of saturation, void ratio and suction. Each model predicts the variation of degree of saturation by means of four parameters, namely two parameters accounting for the effect of void ratio and two parameters accounting for the effect of suction. The models have been calibrated against laboratory data from soils with distinct particle size distributions and have shown accurate predictions of degree of saturation at different levels of suction and void ratio. Validation against additional data has also indicated that the models can extrapolate the soil behaviour to stress paths and suction levels beyond those considered during calibration.

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Experimental Investigation of Long-Term Behaviour of Fly Ash Blended Indian Black Cotton Soil

Singh

Feng

et al. 2021

Developments in Sustainable Geomaterials and Environmental Geotechnics

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Water retention characteristics of swelling clays in different compaction states

Cited by 11 publications

References 50 publications

Microstructure of Compacted Loess and Its Influence on the Soil‐Water Characteristic Curve

Microstructure of Compacted Loess and Its Influence on the Soil‐Water Characteristic Curve

A methodology for the formulation of water retention models in deformable soils

Experimental Investigation of Long-Term Behaviour of Fly Ash Blended Indian Black Cotton Soil

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