Influence of compaction conditions on pore-size distribution and saturated hydraulic conductivity of a glacial till

Watabe, Yoichi; Leroueil, Serge; Bihan, J. P. Le

doi:10.1139/t00-053

Cited by 69 publications

(33 citation statements)

References 18 publications

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“…The horizontal hydraulic conductivity was measured in the radial-flow permeameter described by Watabe et al (2000). The specimen has inner and outer diameters of 48 and 183 mm, respectively, and a height of 75-80 mm.…”

Section: Testing Proceduresmentioning

confidence: 99%

Hydraulic conductivity of compacted tills from northern Quebec

Leroueil¹,

Bihan²,

Sebaihi³

et al. 2002

Can. Geotech. J.

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The hydraulic conductivity of six compacted tills from northern Quebec with different grain-size distributions has been studied in saturated conditions in the laboratory. The results show that compaction conditions play an important role in hydraulic conductivity. When considering the hydraulic conductivities of specimens compacted at degrees of saturation greater than the optimum, there is a good correlation with the content of clay-size particles. This paper provides a good practical tool for evaluating preliminary hydraulic conductivity values of compacted tills from northern Quebec on the basis of their grain-size distribution and compaction conditions. Résumé : La conductivité hydraulique de six tills du nord québécois présentant des granulométries différentes a été étudiée en conditions saturées, en laboratoire. Les résultats montrent que les conditions de compactage jouent un rôle important dans la conductivité hydraulique qui en résulte. Lorsque l'on considère les conductivités hydrauliques mesurées sur des échantillons compactés à des degrés de saturation plus élevés que celui à l'optimum, on obtient une bonne corrélation avec le pourcentage de particules de dimensions argileuses. Cet article fournit donc un bon outil pratique pour une évaluation préliminaire de la conductivité hydraulique des tills du nord québécois sur la base de leur granulométrie et des conditions de compactage.

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Section: Testing Proceduresmentioning

confidence: 99%

Hydraulic conductivity of compacted tills from northern Quebec

Leroueil¹,

Bihan²,

Sebaihi³

et al. 2002

Can. Geotech. J.

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show abstract

“…The larger pore modes were less apparent at low soil plasticities, indicating decreasing clod formation for these soils, which was later confirmed by Leroueil et al (2002). Studies by Benson and Daniel (1990), Watabe et al (2000), and Leroueil et al (2002) further investigated and confirmed the compaction conditions that give rise to a clod soil macro-structure. They found that compacted fine-grained soils can have a clod structure when compacted at moderate energy levels (i.e., standard Proctor) and at water contents dry of optimum.…”

Section: Fig 3-effect Of Formation Relative Compaction (Relative To mentioning

confidence: 72%

Effect of Compaction Conditions on the Seismic Compression of Compacted Fill Soils

Suits¹,

Sheahan²,

Whang

et al. 2004

Geotechnical Testing Journal

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TitleEffect of compaction conditions on the seismic compression of compacted fill soils Effect of Compaction Conditions on the Seismic Compression of Compacted Fill SoilsABSTRACT: Seismic compression is defined as the accrual of contractive volumetric strains in unsaturated compacted soil during earthquake shaking. Existing seismic compression analysis procedures are based on laboratory test results for clean uniform sands, and their applicability to compacted soils with fines is unclear. We evaluate seismic compression from cyclic simple shear laboratory testing of four compacted soils having fines contents that are sufficiently large that fines control the soil behavior, but possessing varying levels of fines plasticity. Each soil material is compacted to a range of formation dry densities and degrees-of-saturation. The test results show that seismic compression susceptibility decreases with increasing density and decreasing shear strain amplitude. Saturation is also found to be important for soils with moderately plastic fines (plasticity index, PI ≈ 15), but relatively unimportant for soils with low plasticity fines (PI ≈ 2) across the range of saturations tested (≥54 %). The saturation effect appears to be linked to the presence or lack of presence of a clod structure in the soil, the clod structure being most pronounced in plastic soils compacted dry of the line-of-optimums or at low densities. Comparisons of test results for soils with and without low-to moderately-plastic fines suggest that fines can decrease the seismic compression potential relative to clean sands.

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“…The relationship between the pore size distribution and the grain size distribution can be constructed for the soils with a homogeneous fabric. Consider a pore limited by a number of grains N g , the pore radius r is related to the radius r g of the smallest grain as follows [12] r = f p r g (15) where f p is a constant less than 1.0. If the particles are randomly arranged, the probability of having a grain of radius less than r g is dP g , and the probability of having the N g -1 grains with a radius greater than r g is 1…”

Section: Soil-water Characteristicsmentioning

confidence: 99%

Application of fractal theory to unsaturated soil mechanics

Tong

2007

Front. Archit. Civ. Eng. China

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The mechanical properties of unsaturated soils are a function of the saturation degree or matric suction, and can be obtained based on currently available procedures. However, each procedure has its limitations and consequently, care should be taken in the selection of a proper procedure. The fractal approach seems to be a potentially useful tool to describe hierarchical systems and is suitable to model the structure and hydraulic properties of unsaturated soils. In this paper, the soil-water characteristics, unsaturated hydraulic conductivity function, unsaturated shear strength, swelling deformation and compression were derived from the fractal model for the pore-size distribution, and were expressed by only two independent physical parameters, the fractal dimension and the air entry value. The predictions of the proposed soil-water characteristics, unsaturated hydraulic conductivity, unsaturated shear strength, swelling deformation and compression were in good agreement with published experimental data. Comparisons between the experimental results of unsaturated hydraulic conductivity and the predictions of the both fractal model and the van Genuchten-Mualem model were also performed, and it was found that the predictions of the fractal model were better than that of the van Genuchten-Mualem model.

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Influence of compaction conditions on pore-size distribution and saturated hydraulic conductivity of a glacial till

Cited by 69 publications

References 18 publications

Hydraulic conductivity of compacted tills from northern Quebec

Hydraulic conductivity of compacted tills from northern Quebec

Effect of Compaction Conditions on the Seismic Compression of Compacted Fill Soils

Application of fractal theory to unsaturated soil mechanics

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