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Showing 1 to 20 of 66 for “"Confining pressure"”.
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Melting of granite under effective confining pressure.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1967.
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The influence of confining pressure on size effect.
Massachusetts Institute of Technology. Dept. of Civil Engineering. Thesis. 1973. M.S.
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An investigation into the failure of neat cement cylinders under independently controlled confining pressure, pore pressure, and axial force
… to study the effect of independently controlled confining pressure and pore pressure on the ultimate axial compressive strength of neat cement cylinders. In trying to achieve this purpose the ultimate strength, deformation, and volume change of the material have been studied. The test program …
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Discrete element modeling of the influences of density and confining pressure on the compression and shear behavior of granular materials
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Liquefaction Potential of Unsaturated Nevada Sand Considering Different Intial Conditions
… air behaves as a cushion and excess pore water pressure is difficult to accumulate. During recent earthquakes, some slopes composed of unsaturated soils experienced large deformation similar to fluid flow. One explanation for this phenomenon is that the unsaturated slopes completely lost their …
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Fracture toughness determination and micromechanics of rock under Mode I and Mode II loading
… rock bridge. To the mantle of the cores a confining pressure may be applied. The application of confining pressure favours the growth of Mode II fractures as large pressures suppress the growth of tensile cracks.Variation of geometrical parameters leads to an optimisation of the PTS- …
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Liquefaction behavior and dynamic properties of loessial (silty) soils
… such as cyclic stress ratio, effective confining pressure, sample remoulding, natural water content, overconsolidation ratio and plasticity index on the liquefaction susceptibility of a loessial soil has been investigated. Strain controlled cyclic triaxial tests were also performed to …
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Using data analytics and laboratory experiments to advance the understanding of reservoir rock properties
… of the complicated petrophysical properties. The confining pressure imposed on a shale formation has a tremendous impact on the permeability of the rock. The correlation between confining pressure and rock permeability is complicated and might be nonlinear. In this thesis, a series of laboratory …
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Mechanical properties of tuffaceous rocks under triaxial conditions
… triaxial compression to observe the effects of confining pressure, saturation, strain rate, and anisotropy on the compressive strengths and Young's Moduli of the specimens. Test results have shown that increasing the confining pressure increased the compressive strength and generally increased …
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Experimental and numerical study of the rod shear test for determining steel-sand interface behavior
… is placed inside a cylindrical soil specimen. A confining pressure is then placed around the specimen/pile assembly and the model pile axially loaded. In some cases rod shear tests in sands have produced anomalously high interface friction angles (δ) which may be, at least in part, due to …
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Elastic properties of sedimentary anisotropic rocks : (measurements and applications)
… times as a function of orientation, and pore and confining pressures to 60 and 65 MPa, respectively. We found that, in room dry condition, most of the rocks studied are transversely isotropic. The stiffnesses constants, Young's moduli, Poisson's ratios, and bulk moduli of these rocks, were also …
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The Effect of Smectite Layer Thickness and Fabric Upon Salt Filtration at Room Temperature
… thicknesses ranged from 0.5 to 2 centimeters, confining pressure was 5000 pounds per square inch, mean brine pressure was 2300 pounds per square inch, and the differential fluid pressure across the clay cake was 1000 pounds per square inch for random fabrics, 2000 pounds per square inch for …
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STRESS AND FREQUENCY DEPENDENT PROPERTIES OF POROELASTIC ANISOTROPIC ROCK
… in a poroelastic medium relates to applied pressure and pore pressure, with the Biot parameter (α) as a scaling factor of the pore pressure. This work offers an independent derivation of the tensor characteristics of α through elastic moduli, a microscopic effective medium derivation, and …
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Mechanistic-Empirical Evaluation of the Mn/ROAD Low-Volume Road Test Sections
… be characterized from rapid shear test at 15-psi confining pressure. The rapid shear test results at 15-psi confining pressure reflect the rutting trends observed in the field. There is no significant effect of granular material quality on the conventional flexible pavement deflection response. …
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Ion Filtration and Stable Oxygen Isotopic Fractionation Resulting From the Passage of Sodium-Calcium-Chloride Brine Through Compacted Smectite Layers at Elevated Temperatures and Pressures
… of experiments were carried out. In one set the confining pressure on the clay was 5000 pounds per square inch (psi) and the mean brine pressure was 2325 psi; in the other set the values were 10,000 and 4650 psi, respectively. In all experiments the differential pressure across the clay plugs was …
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Some applications of Cam-clay in numerical analysis
… experiments. The effects of rate of cavity water pressure increase, bore size, confining pressure and overconsolidation ratio on fracturing pressures were examined. The results of the parametric study of triaxial compression tests and plate loading tests were quantified in terms of stiffness (or …
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Electrokinetic and Chemical Aspects of Transport of Chloride Brines Through Compacted Smectite Layers at Elevated Pressures (Electroosmosis, Streaming, Conductivity)
… chemical composition and of streaming potential. Confining pressure (CP) in these room temperature experiments was 5000 pounds per square inch (psi), differential hydraulic pressure (DHP) across the clay was 2000 psi, and mean hydraulic pressure (MHP) was 2300 psi. These values of CP and MHP are …
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Liquefaction Susceptibility of Uncemented Calcareous Sands From Puerto Rico by Cyclic Triaxial Testing
… densities and consolidated under a range of confining pressures. In addition, cyclic triaxial tests were performed at a confining pressure of 100 kPa and three sets of relative densities (20%, 40% and 60%). Generation of excess pore pressure under different levels of cyclic loading was …
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Rehabilitation and Strengthening of Reinforced Concrete Columns with Iron-Based Shape Memory Alloys
… allows the application of an initial active confining pressure. Such technique does not require expansion to occur for the confining system to engage, hence it can delay the generation of cracks in the concrete element and increase the deformation capability and load capacity. The research …
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The design and construction of a large plane strain apparatus for testing reinforced soil specimens
… on unreinforced and reinforced samples under a confining pressure of 10 psi were performed to check the equipment operation. These tests show that the equipment functions as planned. Modifications desirable to improve the performance of the equipment are given.
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