Effect of shrinkage on air-entry value of soils

Wijaya, Martin; Leong, Eng Choon; Rahardjo, Harianto

doi:10.1016/j.sandf.2014.12.013

Cited by 53 publications

(25 citation statements)

References 43 publications

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“…By plotting a large number of experimental data on a log-log plot of the suction ψ versus the effective degree of saturation Se, Brooks and Corey [41] found that the rate of desaturation exhibits a linear shape for the unsaturated part of the SWCC. This approach was used to avoid the usual difficulties in the determination of the true AEV due to the volume changes in the saturated part of SWCC ( [39,42]). …”

Section: Test Resultsmentioning

confidence: 99%

Soil-Water Characteristic Curve of Residual Soil from a Flysch Rock Mass

et al. 2018

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Depending on the nature of the material and suction range, laboratory measurements of the soil-water characteristic curve (SWCC) can be time-consuming and expensive, especially for residual soils, in which a wide range of particle sizes and soil structures typically results in SWCCs that cover a wide range of suction. Investigations of the SWCCs of residual soil from flysch rock masses are rare, and so far, no results were presented in the literature which were obtained by performing measurements on undisturbed specimens. In this paper, a detailed examination of water retention characteristics is performed for a specific type of residual soil (CL) formed by the weathering of a flysch rock mass. Measurements performed by using different techniques and devices on intact specimens were successfully combined to obtain the SWCC during both drying and wetting processes, under different stress conditions, and from saturated to air-dried conditions. Used procedures are suitable for the determination of SWCCs of soils that undergo volume changes during the drying or the wetting process, since instantaneous volumetric water content can be determined. Results presented in this paper can be used to assess the influence of desaturation of the residual soil covering flysch slopes during dry summer periods by providing key-in material properties required to analyze the transient rainfall infiltration process.

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Section: Test Resultsmentioning

confidence: 99%

Soil-Water Characteristic Curve of Residual Soil from a Flysch Rock Mass

et al. 2018

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“…When volume measurement is not made during the determination of the SWCC, the shrinkage curve can be used with the gravimetric water content SWCC (w-SWCC) to construct the S-SWCC. This was illustrated in Fredlund and Houston (2013), Wijaya et al (2015), and Zhang et al (2018).…”

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confidence: 87%

Discussion of “Permeability function for oil sands tailings undergoing volume change during drying”

Wijaya

Leong

2019

Can. Geotech. J.

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“…However, change in the volume of bentonite, due to the change in water content, will lead to a change in the permeability of the bentonite [3][4][5]. Thus, it is necessary to construct shrinkage curve to understand the relationship between water content with void ratio of the bentonite [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Shrinkage curve can be obtained by drying a soil specimen (i.e. air drying or drying in a desiccator under constant relative humidity) and recording the weight and volume of the soil specimen periodically [8]. The volume measurement can be done by simple methods such as direct measurement technique using a pair of Vernier callipers or more advanced methods such as photogrammetry [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…air drying or drying in a desiccator under constant relative humidity) and recording the weight and volume of the soil specimen periodically [8]. The volume measurement can be done by simple methods such as direct measurement technique using a pair of Vernier callipers or more advanced methods such as photogrammetry [8][9][10]. However, volume measurement based on direct measurement is limited to a soil specimen that has a simple geometry [10] which is not suitable for highly expansive soils such as bentonite due to the nonuniform volume change that causes the bentonite specimen to be highly distorted on drying.…”

Section: Introductionmentioning

confidence: 99%

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Shrinkage Curves for Powder and Granular Bentonites

2019

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Bentonite is one of the most commonly used materials in geotechnical engineering applications especially for isolation purposes due its low permeability and its highly expansive nature. For instance, Geosynthetic Clay Liners (GCL) self-healing ability relies on the swelling properties of the bentonite to close any holes in the GCL while the low permeability of the bentonite serves to reduce the infiltration of leachate to the surrounding soil. However, different types of bentonite have different shrinkage or swelling properties and hence affects the effectiveness of the GCL. A method to assess the wetting/drying induced volume change of the bentonite is through its shrinkage curve. This paper focuses on the shrinkage behaviour of reconstituted granular and powder bentonites which are used in GCL. Photogrammetry method is used to measure the volume change of specimen during drying. The shrinkage curves of the bentonites are then compared with other bentonites from the literature.

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Effect of shrinkage on air-entry value of soils

Cited by 53 publications

References 43 publications

Soil-Water Characteristic Curve of Residual Soil from a Flysch Rock Mass

Soil-Water Characteristic Curve of Residual Soil from a Flysch Rock Mass

Discussion of “Permeability function for oil sands tailings undergoing volume change during drying”

Shrinkage Curves for Powder and Granular Bentonites

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