For triaxial stress-strain experiments on cylindrical specimens: triaxial multistage tests to examine the post-failure reaction, stabilizing or intermittently increasing the surface pressure is possible. The rise in the axial tension takes the path of force or is expansion-controlled.


  • cylindrical rock and soil cores with a length/diameter ratio of 2:1


  • DIN 18137-2, Issue:1990-12 Building ground, tests and testing
  • equipment; determining the lateral resistance; triaxial test
  • ISRM recommendations
  • if required, the national recommendations can be taken into account


  • Class 1


  • max. surface pressure: 1500 bar
  • max. temperature inside cell: 200 °C


  • specially designed compression test frame for carrying out triaxial strength tests in the inset with a triaxial cell
  • equipment to facilitate transportation into the testing room
  • separately controllable pump aggregate for the hydraulic supply of the compression testing machine / pressure intensifier
  • pressure intensifier for producing the pore pressure in the triaxial cell so the specimen is continually subjected to flow-through with controlled fluid pressures
  • safety system (surface pressure > pore pressure)
  • tension measuring and controlling equipment for determining the longitudinal and lateral deformation on cylinders
  • ultrasonic test unit
  • tempering equipment to control the temperature inside the cell
  • digital measuring and controlling electronic system DIGIMAXX® C-21
  • PROTEUS software packet “”Rock and Earthworks”” with GGU evaluation software

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