Servo-Pneumatic Universal Testing


Meets ASTM, AASHTO, NCHRP and other testing standards


User friendly, intuitive and reliable Windows® software developed using LabVIEW


Sophisticated data acquisition and control system


Accessories available to perform a range of standard & non standard test methods

For asphalt & unbound materials

This machine is a development of the NAT which was developed by Keith Cooper and Professor Steven Brown at the University of Nottingham. The use of a high precision servo-pneumatic valve in conjunction with a low-friction actuator and sophisticated data acquisition and control, results in a performance that is equal to many servo-hydraulic systems.

Accurate, digitally generated waveforms are applied by the actuator producing repeatable stress variations in test specimens that are simulative of those in a road pavement due to moving traffic. The actuator is double-acting allowing both compressive and tensile forces to be applied. A triaxial cell system is available for the measurement of the resilient modulus of unbound materials.

Control System and Software 

This machine can be controlled using our Standard Acquisition and Control System along with Universal Software. Universal Software is user friendly, intuitive and reliable Windows® software developed using LabVIEW. Universal test software for the development of test methods using static, sinusoidal, haversine, square, triangular with user selected frequencies and data collection rates. Stored test data can be imported into a spreadsheet package to be analyzed by the user. Utilities are included for transducer check, diagnostic routines and calibration. 

Alternatively, our next generation digital data acquisition and control unit cDAC Advanced  Data Acquisition System brought together in alliance with our flagship software DIMENSION gives you the power to perform the most demanding of tests with your materials testing equipment. cDAC, our next generation class leading digital controller is unparallelled in its field and suitable for advanced testing required for research. 

  • Low cost dynamic loading universal test system ideally suited to testing asphalt and unbound granular materials 
  • High performance ceramic spool servo-valve 
  • Double acting low friction actuator with integral stroke transducer 
  • High quality stainless steel frame 
  • Accessories available to perform a range of standard and non standard test methods 


Maximum Load

3500lbf (15.5kN) dependent on air pressure

Load Transducer

±4496lbf (20kN)

Actuator Stroke

1.2″ (30mm)


0 to 30 Hz

Electrical Supply

110/230V 50/60 Hz, 1 Ph

Compressed Air

7-10 bar (100-145psi) @ 21cfm (600 lpm)


31″ x 40″ x 76″ (780 x 1000 x 1920mm)

Working Space Required (WxDxH)

32.5″ x 65″ x 83″

(825 x 1650


Rapid determination of modulus, permanent deformation and fatigue of bituminous mixtures using cylindrical specimens that are cored from the highway or prepared in the laboratory

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