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Hydraulic Resilient Modulus Testing System (HRMTS)

Model：HRMTS

Use：The GDS Hydraulic Resilient Modulus Testing System (HRMTS) enables the resilient modulus and permanent deformation of unbound base/sub-base pavement materials to be determined.

Standard：AASHTO T 307；AG:PT/T053；AS 1289.6.8.1，GB/T50123-2019

The GDS Hydraulic Resilient Modulus Testing System (HRMTS) enables the resilient modulus and permanent deformation of unbound base/sub-base pavement materials to be determined. The system, uses an axially-stiff load frame with a beam mounted hydraulic actuator to apply dynamic cyclic axial loads, with a GDS triaxial cell used to confine the test specimen. A number of options are also available for measuring axial deformations, ranging from localised LVDTs to external linear potentiometers.



Key features Benefits to the user
Hydraulically-actuated load frame: The HRMTS load frame supersedes pneumatic actuators in terms of overall usable performance, enabling highly-accurate application of load and deformation at high frequencies. Note pneumatic systems tend to show reduced amplitude with increasing load, due to the amount of air that needs to be moved from one side of the actuator to the other.
Easy hardware configuration for specific test standards: Numerous HRMTS hardware configurations can be selected, enabling resilient modulus and permanent deformation to be determined by following most published test standards. This flexibility allows for a range of specimen sizes to be tested, confining pressure to be measured at various locationss, and specimen deformations (axial and radial) to be recorded via localised or external displacement transducers.
Straightforward test automation via GDSLAB test module: Pre-conditioning, resilient modulus, and permanent test stages can all be automatically performed via the Resilient Modulus test module within GDSLAB.


Data Acquisition

16 Bit

Load Range (kN)

28 or 50

Operating Frequency (Hz)

10

Pressure Range (MPa)

1 as standard

Sample Sizes

38 to 150 as standard



  • Optional upgrade to static and dynamic triaxial testing (Full GDS HLF System),with the addition of back pressure control, pore pressure transducer and software modules only.
  • Other upgrade options include user defined waveforms, bender element system (Vertical, Horizontal, S and P waves), hall effect local strain transducers, unsaturated soil testing.
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