Automated rock direct shear tester Load Frame triaxial systems Instruments

The Automated rock direct shear tester Load Frame triaxial systems Instruments is a versatile direct-shear system designed for conventional, incremental, and residual shear tests. This closed-loop, servo-controlled device applies simultaneous hydraulic normal and shear forces to a rock specimen housed in a shear box. It incorporates direct shear specimen rings capable of accommodating cylindrical cores, cubes, prisms, or rock fragments. A dedicated computing station records both force and displacement data in real time. The system operates under constant normal load (CNL), constant normal stiffness (CNS), or constant normal displacement (CND) modes while it can simultaneously apply constant incremental or ramped shear loads or displacements. Data collected during testing allows for the determination of key shear strength parameters, such as cohesion (c) and friction angle (Ø). Each unit can be custom-configured to specific needs, offering a wide range of shear and normal load capacities as well as specimen sizes—ensuring a tailored and precise solution for every user. The unit complies with ASTM D5607 and ISRM standards.