Soils at critical state are like a visco-plastic fluids, which will flow for applied stresses gre... more Soils at critical state are like a visco-plastic fluids, which will flow for applied stresses greater than the critical state (CS) shear strength. Shear viscosity is a key parameter to understand the post-failure flow response of soils in geotechnical applications such as landslides, jacked piles and cone penetrometers. Viscosity of soil has been investigated for water contents greater than the liquid limit because at these water contents standard viscometers can be used. However, soils can reach CS for water contents in the plastic range and thereafter exhibit viscous behavior without further changes in water contents. There is no standard method to determine shear viscosity of clays at water contents lower that the liquid limit. A new analytical method is proposed to determine the viscous drag (force) on the penetrating cone in a fall cone test. Based on this analysis, it is possible to interpret the shear viscosity of clays with water contents less than the liquid limit from a pe...
Journal of Geotechnical and Geoenvironmental Engineering, 2007
This paper presented a numerical solution to an interesting phenomenon that excess pore water pre... more This paper presented a numerical solution to an interesting phenomenon that excess pore water pressure is caused by the gas generated in wet municipal landfills. The proposed equivalent fluid weight has valuable applications in evaluating the slope stability of wet landfills. However, it is discussers' opinion that it is not necessary to use finite-difference method for calculating the excess pore pressure. In this discussion, a close-form solution to the same problem is proposed and some discussions will be presented.
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1996
... Biot's (1941) coupled stress—pore water pressure equa-tion was solved using ... more ... Biot's (1941) coupled stress—pore water pressure equa-tion was solved using a fixed-mesh finite-element procedure (Desai 1976; Bathe and Khoshgoftaar 1979; Desai and Li 1983;Desai 1984; Lacy and Prevost 1987; Cividini and Gioda 1989). ...
Available electronically: http://www.dlib.org/dlib/november01/11contents.html. ... Librarian-Init... more Available electronically: http://www.dlib.org/dlib/november01/11contents.html. ... Librarian-Initiated Publications Discovery: How Do Digital Depository Librarians Discover and Select Web-Based Government Publications for State Digital Depositories? ... Help ERIC expand online ...
... Search. XML. To cite or link to this reference: http://hdl.handle.net/10068/659460. Title : S... more ... Search. XML. To cite or link to this reference: http://hdl.handle.net/10068/659460. Title : Some aspects of the behaviour of soils in simple shear. Authors : Airey, DW ; Budhu, M. ; Wood, DM ; Corporate author : Cambridge Univ. (United Kingdom). Dept. ...
AbstractA feasibility study was performed on using xanthan gum and guar gum, two biopolymers that... more AbstractA feasibility study was performed on using xanthan gum and guar gum, two biopolymers that are naturally occurring and inexpensive, to stabilize mine tailings (MT). The simple fall cone method was adopted to evaluate the liquid limit and undrained shear strength of sun-dried MT mixed with xanthan gum or guar gum solutions at different concentrations. Environmental scanning electron microscopy (ESEM) imaging was also conducted to study the microstructure of the biopolymer-MT system. The results indicate that the inclusion of xanthan gum or guar gum increases both the liquid limit and the undrained shear strength of the MT, higher biopolymer concentrations leading to greater increases. The increase of the liquid limit and undrained shear strength of the MT mixed with a biopolymer solution is mainly attributable to the high viscosity of the biopolymer pore fluid and the bonding between the biopolymer and the MT particles. Guar gum is more effective than xanthan gum in increasing the liquid limit and u...
Soils at critical state are like a visco-plastic fluids, which will flow for applied stresses gre... more Soils at critical state are like a visco-plastic fluids, which will flow for applied stresses greater than the critical state (CS) shear strength. Shear viscosity is a key parameter to understand the post-failure flow response of soils in geotechnical applications such as landslides, jacked piles and cone penetrometers. Viscosity of soil has been investigated for water contents greater than the liquid limit because at these water contents standard viscometers can be used. However, soils can reach CS for water contents in the plastic range and thereafter exhibit viscous behavior without further changes in water contents. There is no standard method to determine shear viscosity of clays at water contents lower that the liquid limit. A new analytical method is proposed to determine the viscous drag (force) on the penetrating cone in a fall cone test. Based on this analysis, it is possible to interpret the shear viscosity of clays with water contents less than the liquid limit from a pe...
Journal of Geotechnical and Geoenvironmental Engineering, 2007
This paper presented a numerical solution to an interesting phenomenon that excess pore water pre... more This paper presented a numerical solution to an interesting phenomenon that excess pore water pressure is caused by the gas generated in wet municipal landfills. The proposed equivalent fluid weight has valuable applications in evaluating the slope stability of wet landfills. However, it is discussers' opinion that it is not necessary to use finite-difference method for calculating the excess pore pressure. In this discussion, a close-form solution to the same problem is proposed and some discussions will be presented.
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1996
... Biot's (1941) coupled stress—pore water pressure equa-tion was solved using ... more ... Biot's (1941) coupled stress—pore water pressure equa-tion was solved using a fixed-mesh finite-element procedure (Desai 1976; Bathe and Khoshgoftaar 1979; Desai and Li 1983;Desai 1984; Lacy and Prevost 1987; Cividini and Gioda 1989). ...
Available electronically: http://www.dlib.org/dlib/november01/11contents.html. ... Librarian-Init... more Available electronically: http://www.dlib.org/dlib/november01/11contents.html. ... Librarian-Initiated Publications Discovery: How Do Digital Depository Librarians Discover and Select Web-Based Government Publications for State Digital Depositories? ... Help ERIC expand online ...
... Search. XML. To cite or link to this reference: http://hdl.handle.net/10068/659460. Title : S... more ... Search. XML. To cite or link to this reference: http://hdl.handle.net/10068/659460. Title : Some aspects of the behaviour of soils in simple shear. Authors : Airey, DW ; Budhu, M. ; Wood, DM ; Corporate author : Cambridge Univ. (United Kingdom). Dept. ...
AbstractA feasibility study was performed on using xanthan gum and guar gum, two biopolymers that... more AbstractA feasibility study was performed on using xanthan gum and guar gum, two biopolymers that are naturally occurring and inexpensive, to stabilize mine tailings (MT). The simple fall cone method was adopted to evaluate the liquid limit and undrained shear strength of sun-dried MT mixed with xanthan gum or guar gum solutions at different concentrations. Environmental scanning electron microscopy (ESEM) imaging was also conducted to study the microstructure of the biopolymer-MT system. The results indicate that the inclusion of xanthan gum or guar gum increases both the liquid limit and the undrained shear strength of the MT, higher biopolymer concentrations leading to greater increases. The increase of the liquid limit and undrained shear strength of the MT mixed with a biopolymer solution is mainly attributable to the high viscosity of the biopolymer pore fluid and the bonding between the biopolymer and the MT particles. Guar gum is more effective than xanthan gum in increasing the liquid limit and u...
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