Cyclic Triaxial Testing System (with compensated Ram)

Cyclic Triaxial Testing System with compensated Ram

Model No. LO7025/2 DYN

This testing system is a dynamic universal testing machine with electro-mechanical precision drive for compression and tension tests up to 20 kN and for high accuracy cyclic tests up to 10 Hz and covers all the test procedures for unbound material triaxial testing.

The system includes a special load pistol construction to compensate cell-pressure changes affected by the volume change of the movement of piston in and out of the triaxial cell.

Static and dynamic load applies from the bottom of triaxial cell. At top of cell there is a free operating space to facilitate installation of sample, or force measuring device or etc.

The powerful multifunctional GEOsys Software supports all the test procedures with a well access to all testing sessions.


  • Features
  • Specifications
  • Upgrade Options
  • Software
  • Standards
  • Applications
  • Electromechanical precision servo-drive for highly precise environmental-friendly device control.
  • Specially designed and configured for static and cyclic triaxial test methods.
  • Environmental-friendly unit, no need for compressed air, or hydraulic power source.
  • Static and dynamic load applies from the bottom of triaxial cell.
  • Different submersible transducers for higher accuracy is available.
  • For all requirements of seismic research, and all kinds of stress and strain path tests
  • Electromechanical or Servo-Pneumatic Cyclic pressure controller for generating hydrostatic pressures (3, 10 or 20 bar) up to 10 Hz to perform static or cyclic confining pressures.

Static and cyclic axial load

Up to 20 kN

Cyclic frequency

Up to 10 Hz

Confining pressure

Up to 3 MPa

Confining pressure frequency

Up to 10 Hz

Sample Size

Up to 150 mm

  • Unsaturated test for different sample sizes
  • Bender element test package
  • Internal submersible measuring device

Fully automatic multi channel Triaxial control and data acquisition software ,GEOSYS-Professional-Windows version, this free programmable software solution gives the possible to the user to realise every stress or strain controlled test (standard triaxial tests, stress-path tests) and any other tests procedures with complex sequences (test editor) with any amount and free definable stop and calculated criteria (formula editor)

For example the structure can be as followed:

  • Test type and conditions / Specimen parameters
  • Test stages with
  • consolidation stage (isotropic or anisotropic)
  • saturation stage (saturated/unsaturated)
  • B-value check control
  • B Check, Sauration ramps, Isotropic consolidation
  • saturation ramps of cell pressure and back pressure
  • Standard Triaxial Testing : UU, CU,CD with pore pressure measurement
  • unconsolidated - undrained with pore pressure measurement
  • consolidated - drained with pore pressure measurement
  • all shear stages (compression and extension tests for simulating all kinds of stress-paths
  • K0-tests (if hardware is available)
  • unsaturated test conditions with air pressure control
  • Advance Loading Module
  • Load Control low frequency cyclic loading
  • Independent control (constant ramp cycle) of
    • axial stress, axial strain or axial load
    • radial stress
    • back pressure
    • low frequency cyclic loading
    • anisotropic consolidation
  • Stress Path Module ,Linear Stress Paths p, q or s, t
  • Swelling
  • Advanced Dynamic Triaxial Testing:
  • Cyclic control of load
  • Cyclic control of displacement
  • Dynamic ramps
  • Monitoring with simultaneous data calculation during the tests
  • Data conversion to ASCII format
  • EN 13286-7:2004 (E)
  • Unbound and hydraulically bound mixtures. Cyclic load triaxial test for unbound mixtures

  • AASHTO T-292
  • Interim Method of Test for Resilient Modulus of Subgrade Soils and Untreated Base/Subbase Materials

    (replaced by AASHTO T-307)

  • AASHTO T-294
  • Standard Method of Test for Resilient Modulus of Unbound Granular Base/Subbase Materials and Subgrade Soil-SHRP Protocol P46

  • AASHTO T-307
  • Standard Method of Test for Determining the Resilient Modulus of Soils and Aggregate Materials

  • AASHTO T-307-99
  • Standard Method of Test for Determining the Resilient Modulus of Soils and Aggregate Materials

  • AASHTO TP-46
  • Standard Test Method for Determining the Resilient Modulus of Soils and Aggregate Materials

    (replaced by AASHTO T-307)

  • Austroads AG:PT/T053
  • Determination of permanent deformation & resilient modulus characteristics of unbound granular materials under drained conditions

  • Detailed information will follow soon
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