Cyclic Triaxial Testing System for Unbound Material Testing

This testing system is a dynamic universal testing machine with electro-mechanical precision drive for compression and tension tests up to 30 kN and for high accuracy cyclic tests up to 15 Hz and covers all the test procedures for unbound material triaxial testing.

Different submersible transducers for higher accuracy is available e.g. submersible local axial-deformation; submersible load cell for accurate measurement of axial loads with confining pressure compensation and Submersible local radial-deformation measuring devices.

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




  • Specially designed and configured for static and cyclic uniaxial and triaxial test methods regarding EN, AFNOR, ASTM and AASHTO
  • For all requirements of seismic research, unbound material testing for road research and all kinds of stress and strain path tests
  • Special triaxial cell for unbound and granular material
  • Cyclic pressure controller for generating hydrostatic pressures (3, 10 or 20 bar) up to 10 bar to perform static or cyclic confining pressures between 0.1 and 10 Hz for use with CLC and CLV tests according to EN 13286-7
  • Phase shift control of axial and cell pressure in real time
  • With automatic elevation device for the cell wall for easy specimen preparation and positioning of the interior measuring sensors

Static axial load

Up to 25 kN

Cyclic axial load

Up to 25 kN 

Cyclic frequency

Up to 15 Hz

Confining pressure

0.3 / 1 / 2 MPa

Confining pressure frequency

Up to 10 Hz 

Sample size 

100 / 150 / 160 / 300 mm

  • Not available
  • Not available
  • 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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