The GCTS RPX-300 Polyaxial fixture can be used to study the intermediate principal stress effect on rock engineering behavior and describe adequately the strength of rock under a general system of Polyaxial compressive stresses.
The RPX-300 is a simple and economical fixture that enhances the capabilities of standard GCTS Rock Triaxial systems that includes both, cell and pore pressure control. This fixture is designed to fit inside GCTS triaxial cells and use the load frame to (typically) apply σ1, σ2 and σ3 are applied through the fixture’s flat jacks. Ultrasonic sensors can also be provided to study the effects anisotropic stress conditions on compression and shear wave velocities. Velocities for all three axes can easily be measured during Polyaxial tests with this option
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