Effects of salt concentration on the yield stress of sodium montmorillonite suspension

Sakairi, N.; Kobayashi, Motoyoshi; Adachi, Yasuhisa

doi:10.1016/j.jcis.2004.08.181

Cited by 43 publications

(29 citation statements)

References 15 publications

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“…Nevertheless, this crude approximation shows that the smectite system is essentially controlled by volume exclusion effects. This is consistent with many recent works (Bavarian et al 2003;Sakairi et al 2005), which also indicate that Na-smectite suspensions are stabilized by electrostatic repulsion.…”

Section: Data Interpretation and Discussionsupporting

confidence: 93%

Influence of ethanol/water mixture on the undrained shear strength of pure clays

Spagnoli

Stanjek

Sridharan

2011

Bull Eng Geol Environ

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The mechanical properties of clays are highly dependent not only on the stress/strain ratio to which the material is subjected but also on the chemistry of the pore fluids which in turn affects the intergranular or the effective stresses. Atterberg limits and vane shear tests were performed with different pore fluids in order to observe how the fine-grained material mechanically responded. The diffuse double layer theory has been used to interpret the data of vane shear tests in order to explain the variation of geotechnical responses with the different clays. Van der Waals forces and double layer forces were obtained and capillary forces calculated. The results show that while for kaolinite and illite the chemistry of the pore fluids has no influence on the water content and hence on the mechanical behaviour of the material, Na-smectite shows a strong correlation between the dielectric constant of the pore fluids and an increase in undrained shear strength. The data obtained extends an understanding of the influence of the dielectric constant (e) of the pore fluids on the geotechnical properties of fine-grained materials.Keywords Clays Á Geotechnical investigations Á Pore fluids Á Diffuse double layer Á Dielectric constant Á Undrained shear strength Résumé Les propriétés mécaniques des argiles sont fortement dépendantes, non seulement du mode de sollicitation mécanique en contrainte et déformation, mais aussi du chimisme des fluides interstitiels qui influence les contraintes intergranulaires ou effectives. Des mesures des limites d'Atterberg et des essais au scissomètre ont été réalisés avec différents fluides interstitiels afin d'observer la réponse de ces matériaux fins. La théorie de la double couche a été utilisée pour interpréter les données scissométriques, expliquant les réponses géotechniques en fonction des types d'argiles. Les forces de Van der Waals et les forces associées à la double couche ont été obtenues et les forces de capillarité calculées. Il apparaît que le chimisme des fluides interstitiels n'a pas d'influence sur la teneur en eau et de ce fait sur le comportement méca-nique de matériaux constitués de kaolinite ou d'illite. Par contre, une forte corrélation entre la constante diélectrique des fluides interstitiels et la résistance au cisaillement non drainé de matériaux constitués de smectite Na est observée. Les données obtenues améliorent la compréhen-sion de l'influence de la constante diélectrique des fluides interstitiels sur les propriétés géotechniques des matériaux fins.Mots clés Argiles Á Etudes géotechniques Á Fluides interstitiels Á Théorie de la double couche Á Constante diélectrique Á Résistance au cisaillement non drainé

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Section: Data Interpretation and Discussionsupporting

confidence: 93%

Influence of ethanol/water mixture on the undrained shear strength of pure clays

Spagnoli

Stanjek

Sridharan

2011

Bull Eng Geol Environ

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“…It is commonly understood that the face of a clay particle, such as kaolinite and bentonite, carries permanent negative charges, while the charges carried by the edge are positive at acidic pH and negative at alkaline pH. As a result, the yield stress is mainly determined by the electrostatic double-layer forces between particles [10][11][12][13][14]. For kaolinite suspensions, it is found that the yield stress origins from the edge-to-face electrostatic attractive interaction between particles at a low concentration, while the interaction changes to the face-to-face electrostatic repulsive interaction with increasing concentration of clay [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on rheological behavior of kaolinite and bentonite suspensions

Lin

Cheah

Phan‐Thien

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Although repeated measurements on suspensions with solids contents below 4 vol.% were consistent with the observed trends, the viscous character of these systems may lead to measurement uncertainties, especially with regard to viscoelasticity measurements. Such complex behavior regarding the rheological properties of clay minerals as a function of ionic strength and solids content has been noted elsewhere (Abend and Lagaly, 2000;Sakari et al, 2005;Chang and Leong, 2014). Nevertheless, until more detailed measurements are performed, any conclusions made regarding the nature of the suspensions at low solids contents are tenuous at best.…”

Section: Rheological Experimentsmentioning

confidence: 73%

Rheological properties of clay material at the solid/solution interface formed under quasi-free swelling conditions

Eriksson

Schatz

2015

Applied Clay Science

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Effects of salt concentration on the yield stress of sodium montmorillonite suspension

Cited by 43 publications

References 15 publications

Influence of ethanol/water mixture on the undrained shear strength of pure clays

Influence of ethanol/water mixture on the undrained shear strength of pure clays

Effect of temperature on rheological behavior of kaolinite and bentonite suspensions

Rheological properties of clay material at the solid/solution interface formed under quasi-free swelling conditions

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