Micaceous Sands: Microscale Mechanisms and Macroscale Response

Lee, Jong Sub; Guimaraes, Maria; Santamarina, J. Carlos

doi:10.1061/(asce)1090-0241(2007)133:9(1136)

Cited by 52 publications

(19 citation statements)

References 12 publications

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“…Laboratory experiments using an oedometer cell equipped with bender elements have been widely conducted and have gradually become a standard test procedure for evaluating soil properties (Fam & Santamarina, 1995;Yun & Santamarina, 2005;Lee et al, 2007aLee et al, , 2007bLee et al, 2008).…”

Section: Technical Notementioning

confidence: 99%

Stiffness characteristics of soluble mixtures

Truong¹,

Eom²,

Lee³

2010

Géotechnique

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Soils naturally contain grains of different minerals, which may be dissolved under chemical or physical processes. The dissolution leads to changes in the microstructure of the particulate media, such as an increase in local voids or permeability, which affects the strength and deformation of soils. This study focuses on the small strain stiffness characteristics of soluble mixtures, which consist of sand and salt particles at different volume fractions. Experiments were carried out in a conventional oedometer cell integrated with bender elements for the measurement of shear waves. Dissolutions of particles were implemented by saturating the mixtures at various confining stresses. Experimental results show that, after dissolution, the vertical strain and the void ratio increase, whereas the shear wave velocity decreases. The decrease of the velocity results from the void ratio increase and particle contact decrease. It is proven that specimens prepared from sand and salt particles are able to provide valuable insight into the macrostructural behaviour of soluble mixtures.

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Section: Technical Notementioning

confidence: 99%

Stiffness characteristics of soluble mixtures

Truong¹,

Eom²,

Lee³

2010

Géotechnique

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“…To cite just a few contributions that tend by a systematic approach to explain the macrobehaviour of mixed soils from the local physics, let us mention the works of Boutin and Auriault [2] on bituminous sand, Georgianou et al and Wood and Kumar [3,4] on clayed sands, Thevanayagam [5] on silty sands, Pedro et al [6] on coarse soils, Kristenssen and Ahadi [7] on coarse and clayed soils, Lee et al [8] on micaceous sands, Edil and Bosscher. [9], Kim and Santamarina [10] on sand-rubber, Abou-Chakra Guery et al [11] on argillites.…”

Section: Boutin G Kacprzak and D Thiepmentioning

confidence: 99%

Compressibility and permeability of sand–kaolin mixtures. Experiments versus non‐linear homogenization schemes

Boutin

Kacprzak

Doanh

2010

Num Anal Meth Geomechanics

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SUMMARYThis study deals with the behaviour of mixtures of sand and saturated kaolin paste considered as composite materials made of permeable and deformable (with non-linear behaviour) matrix (the kaolin paste) with rigid and impervious inclusions (the sand grains). Oedometric and permeability tests highlight the key role of the state of the clay paste, and show the existence of a threshold of sand grain concentration above which a structuring effect influences both compressibility and permeability. At the light of these experiments two homogenization schemes (with simplifying assumptions to make the problem manageable) are considered to model these two parameters. Qualitative and quantitative comparisons with experimental data point out their respective domain of interest and limitations: a tangent homogenization scheme is shown to be sufficient to describe the macroscopic properties for dilute sand concentration; above the concentration threshold, the structuring effect is captured by the new homogenization scheme developed in this paper.

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“…The reference data have been measured for various granular materials, including clays, silty clay, sand, steel balls, and lead shot. The measured α and β of muskeg are acceptable to compare the published reference data (Lee et al, 2007;Ku et al, 2011;Bate et al, 2013). Based on the reference data, the relationship between α and β is newly proposed as:…”

Section: S-wave Velocitymentioning

confidence: 84%

“…Although no standard testing method has been (2007) 10 -12 10 -10 10 -8 10 -6 10 -4 * Data from Mesri and Olson (1971). Organoclay from Bate et al (2013) Reference data from Ku et al (2011) Sand-mica mixture from Lee et al (2007) × + × Fig. 7.…”

Section: Shear Strengthmentioning

confidence: 99%