C104MLPP Automatic Servo-Controlled System for Triaxial Rock Tests

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The system is designed for the triaxial testing of rock specimens, ensuring precise control of confining pressure during test execution. It is a critical component in advanced geomechanical analysis, enabling engineers to assess parameters such as Poisson’s ratio, Young’s modulus, and triaxial failure stress.

Used in combination with a Hoek cell and axial compression load frame (1500, 2000 or 3000 kN capacity), this servo-controlled unit maintains constant isotropic pressure up to 70 MPa with ±1% accuracy, as required by international standards.

The system enables both single-stage and multi-stage triaxial testing, offering a powerful and cost-effective alternative when testing time, specimen availability, or budgets are limited. In a single multi-stage triaxial test, the system can simulate multiple failure states and generate a complete failure envelope, reducing the need for multiple individual tests.

Integrated extensometers (applied directly to the specimen surface) provide real-time acquisition of axial and radial deformation, allowing the software to automatically calculate:

• Poisson’s ratio
• Stress-strain curves
• Tangent and secant Young’s modulus
• Maximum compressive strength under triaxial conditions

Designed to work seamlessly with the Servo-Plus Progress control unit (mod. C104N) and the Elastic Modulus Test System for Rocks (mod. A150M), this module ensures precise, automated execution of the full test cycle.

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