The behavior of a synthetic silt in simple shear at different degrees of saturation

Farzad Daliri, Paul Simms, Siva Sivathayalan

In the proceedings of: GeoManitoba 2012: 65th Canadian Geotechnical Conference

Session: T3A - Soil Mechanics III

ABSTRACT: Constant volume simple shear tests have been shown to provide enhanced means of simulating truly undrained behaviour in sands and clays. However, there is a doubt in applicability of constant volume simple shear tests for unsaturated materials. This paper aims to investigate the effect of degree of saturation on the monotonic response of constant volume tests on fine grained soils, in this case silty-sized beads were adopted to simulate shear behaviour of actual silty tailings. It was found that the constant volume response of dry and partially saturated specimens with different degrees of saturation at same void ratio are identical for silty material that matric suction is low enough (<20 kPa) in unsaturated condition.

RÉSUMÉ: Constant tests de volume de cisaillement simple ont été montré pour fournir des moyens accrus de simuler le comportement non drainé véritablement dans les sables et argiles. Cependant, il ya un doute dans l'applicabilité de volume constant essais de cisaillement simple pour les matériaux insaturés. Cet article vise à étudier l'effet du degré de saturation sur la réponse monotone des tests volume constant sur sols à grains fins, dans ce cas-limoneux de taille perles ont été adoptées afin de simuler le comportement en cisaillement des résidus limoneux réels. Il a été constaté que la réponse à volume constant de spécimens secs et partiellement saturé avec différents degrés de saturation à l'indice des vides même sont identiques pour le matériel limoneux que la succion matricielle est assez faible (<20 kPa) dans un état non saturé. Key words : Simple shear, constant volume test, tailings, synthetic silt

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Cite this article:
Farzad Daliri; Paul Simms; Siva Sivathayalan (2012) The behavior of a synthetic silt in simple shear at different degrees of saturation in GEO2012. Ottawa, Ontario: Canadian Geotechnical Society.

@article{Paper387,author = Farzad Daliri; Paul Simms; Siva Sivathayalan,title = The behavior of a synthetic silt in simple shear at different degrees of saturation,year = 2012}