Laboratory testing

The IfG rock mechanics laboratory conducts comprehensive analyses to determine the physical and hydraulic properties of rocks and other solid materials to assess their key rock mechanical parameters. These are used as input values for deriving material model parameters. The investigations focus on a broad range of topics, including stress- and strain-controlled triaxial strength and shear tests, including dilatancy measurements at different confining pressures or normal stresses. Additionally, creep tests at elevated thermodynamic boundary conditions, consolidation tests, and permeability measurements are part of our experimental suite.

The IfG rock mechanics laboratory offers a wide range of testing methods and analytical procedures. The specific details of the tests, adjustments to test procedures, additional test types, and boundary conditions can be tailored to the requirements of each project.

Studies and experiments

The following sample properties/ parameters are being determined in our laboratory:

• Bulk and Grain Density
• Ultrasonic Wave Velocity (P and S wave)
• Dynamic and Static Elastic parameters
• Water content
• Porosity
• Permeability (gas and liquid medium)
• Uniaxial Compressive Strength
• Tensile Strength (Direct and Indirect, modified)
• Triaxial Compressive and Extension Strength
  • Strain- or stress controlled
  • Including post failure recording
  • Including dilatancy measurement
  • Including elevated temperatures
  • Including intermediate permeability measurement
  • Including relaxation phases and cyclic stress
• Shear Strength
  • Strain controlled
  • Including post failure recording
  • Including dilatancy measurement
• Pillar Limit Stress
• Backfill Pressure
• Long-term Creep Parameters
  • Compression and Extension
  • Including elevated temperatures
  • Including intermediate permeability measurement
• Swelling pressure tests including solution permeability

Test rigs