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Comparative Evaluation of Xanthan Gum, Guar Gum, and Scleroglucan Solutions for Mobility Control: Rheological Behavior, In-Situ Viscosity, and Injectivity in Porous Media. [PDF]
Polymers (Basel)Herrera Saravia JM +1 more
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Research on the characteristics and mechanism of bottom expansion backfilling anchoring reinforcement in fractured surrounding rock roadway. [PDF]
Sci RepWang S +5 more
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2014 Joint Rail Conference, 2014
This paper summarizes the appropriate equipment and test procedure for ballast shear strength testing using the direct shear method (ASTM D3080 and D5321) and presents some typical results. To accomplish this ballast testing, a full-scale direct shear box was developed that can accommodate an approximately 1 m (3 feet) wide and 0.6 m (2 feet) deep ...
Robert H. Swan +2 more
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This paper summarizes the appropriate equipment and test procedure for ballast shear strength testing using the direct shear method (ASTM D3080 and D5321) and presents some typical results. To accomplish this ballast testing, a full-scale direct shear box was developed that can accommodate an approximately 1 m (3 feet) wide and 0.6 m (2 feet) deep ...
Robert H. Swan +2 more
openaire +2 more sources
A numerical examination of the direct shear test [PDF]
Géotechnique, 2007 The paper presents results of two-dimensional simulations of the direct shear test using the discrete element method (DEM). The heterogeneous distributions of stress and strain are illustrated and, taking advantage of the numerical technique, the evolution of the stress tensor and porosity changes in the shear zone are monitored.
Ling Zhang, Colin Thornton
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Shear behaviour of a cement grout tested in the direct shear test
Construction and Building Materials, 2018Abstract Portland cement grouts are widely used in the mining industry to bond cable bolts with the surrounding rockmass. Numerous laboratory and field tests showed that bond failure of the cable/grout interface is the dominant failure mode. Previous research has found that shear behaviour of the grout along a pre-defined plane plays a significant ...
Jianhang Chen +3 more
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Investigation of shear performance of UHPC by direct shear tests
Engineering Structures, 2019Abstract Ultra-high performance concrete (UHPC) has been applied widely in modern structure construction. The outstanding mechanical properties of UHPC not only enable strong yet slim structural designs but also highlight its potential in protective structural constructions against extreme loads.
Chengqing Wu +3 more
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Numerical Simulations of the Direct Shear Test
Chemical Engineering & Technology, 2003AbstractNumerical simulations of the direct shear test have been performed under constant normal stress conditions, using the Discrete Element Method. Results are presented to show how the average shear to normal stress ratio acting on the shear band compares with the force data at the boundaries.
Colin Thornton, Ling Zhang
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Direct shear testing of seeds in bulk
Journal of Agricultural Engineering Research, 1980Abstract To apply existing theories to the prediction of wall pressures in the structures for the storage of agricultural seeds it is necessary to know the shear properties of the materials to be stored. Equipment already used in soil engineering is unsuitable because of the lower stresses involved in testing seeds and the larger particle sizes.
J.A. Marchant, P.J. Lawton
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