Remarks on the design of clay liners used in lagoons as hydraulic barriers

Leroueil, Serge; Bihan, J. P. Le; Bouchard, R.

doi:10.1139/t92-056

Cited by 24 publications

(17 citation statements)

References 10 publications

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“…The requirements put forward by Leroueil et al (1992) and Benson et al (1999) for obtaining low hydraulic conductivity thus remain valid. Such requirements may be difficult to apply for these materials, however, since a very small change in water content considerably changes the strength and thus trafficability of the material.…”

Section: Practical Implicationsmentioning

confidence: 99%

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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: Practical Implicationsmentioning

confidence: 99%

“…From such observations, Leroueil et al (1992) and Benson et al (1999) suggested construction specifications for clay liners with compaction degrees of saturation equal to or greater than the optimum and water contents less than the trafficability limit.…”

Section: Practical Implicationsmentioning

confidence: 99%

Hydraulic conductivity of compacted tills from northern Quebec

Leroueil¹,

Bihan²,

Sebaihi³

et al. 2002

Can. Geotech. J.

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“…Figure 2(a) presents data from the published literature (Benson and Trast, 1995;Blotz et al, 1998;Daniel and Benson, 1990;Daniel and Wu, 1993;Fleureau et al, 2002;Lee et al, 2007;Leroueil et al, 1992;Lim and Miller, 2004;Miller et al, 2002;Osinubi, 2006) that depicts the relationship between the plastic limit and the optimum water content. As can be seen from the figure, the plastic limit is a water content that is generally slightly higher than the optimum water content.…”

Section: Atterberg Limits and Soil Compaction Conditionsmentioning

confidence: 99%

“…Considering the best-fit approximation between the plastic limit and the optimum water content (Figure 2(a)), and taking into account that this study relates to compacted soil, a liquidity index for compacted soils (I C L ) was defined, wherein the plastic limit was replaced by the optimum water content, as suggested by Leroueil et al (1992).…”

Section: Atterberg Limits and Soil Compaction Conditionsmentioning

confidence: 99%

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Unconfined shear strength of compacted unsaturated plastic soils

Marinho¹,

Oliveira²

2012

Proceedings of the Institution of Civil Engineers - Geotechnica

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A central goal in unsaturated soil mechanics research is to create a smooth transition between traditional soil mechanics approaches and an approach that is applicable to unsaturated soils. Undrained shear strength and the liquidity index of reconstituted or remoulded saturated soils are consistently correlated, which has been demonstrated by many studies. In the liquidity index range from 1 (at wl) to 0 (at wp), the shear strength ranges from approximately 2 kPa to 200 kPa. Similarly, for compacted soil, the shear strength at the plastic limit ranges from 150 kPa to 250 kPa. When compacted at their optimum water content, most soils have a suction that ranges from 20 kPa to 500 kPa; however, in the field, compacted materials are subjected to drying and wetting, which affect their initial suction and as a consequence their shear strength. Unconfined shear tests were performed on five compacted tropical soils and kaolin. Specimens were tested in the as-compacted condition, and also after undergoing drying or wetting. The test results and data from prior literature were examined, taking into account the roles of void ratio, suction, and relative water content. An interpretation of the phenomena that are involved in the development of the undrained shear strength of unsaturated soils in the contexts of soil water retention and Atterberg limits is presented, providing a practical view of the behaviour of compacted soil based on the concept of unsaturated soil. Finally, an empirical correlation is presented that relates the unsaturated state of compacted soils to the unconfined shear strength.

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Undrained Shear of Plastic Soils under Suction

Marinho

2013

Springer Series in Geomechanics and Geoengineering

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Remarks on the design of clay liners used in lagoons as hydraulic barriers

Cited by 24 publications

References 10 publications

Hydraulic conductivity of compacted tills from northern Quebec

Hydraulic conductivity of compacted tills from northern Quebec

Unconfined shear strength of compacted unsaturated plastic soils

Undrained Shear of Plastic Soils under Suction

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