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Asphalt Pavement Thermal Testing System (TSRST)

Optimise low temperature performance of asphaltic concrete mixtures. Complies with AASHTO TP10 and EN 12697-46

The Thermal Stress Restrained Specimen Test (TSRST) is used to determine the low temperature cracking susceptibility of asphalt concrete. In the early 1990s the TSRST was developed by OEM with Oregon State University (OSU) as part of the Strategic Highway Research Program. The test method became AASHTO TP10. The TSRST test has also been included as one of the tests within EN12697-46. OEM-Cooper have developed the TSRST device to perform tests included in this standard. Now as a multi-purpose low temperature testing machine, the TSRST has been renamed the Asphalt Pavement Thermal Testing System (APTTS).
With over 20 years of experience, and as the original developers of the TSRST OEM-Cooper are the recognized world experts in the field.


    • ✓ Thermal Stress Restrained Specimen Test (TSRST)
  • EN 12697-46:2020
    • ✓ Uniaxial Tension Stress Test (UTST)
      ✓ Thermal Stress Restrained
      ✓ Specimen Test (TSRST)
      ✓ Relaxation Test (RT)
      ✓ Tensile Creep Test (TCT)

    • AASHTO TP XX (2012)

    Key Features

    • Cool or heat an asphaltic concrete specimen at a constant temperature
    • Simulate actual field conditions with user programmable temperature profiles
    • Perform cyclic temperature testing
    • Minimises radial and/or transverse forces with dual clevis and rod end assemblies

    Key Uses

    • Determines the failure characteristics of Asphaltic Concrete (AC) specimens when cooled below freezing according to a user defined temperature profile
    • Evaluates low temperature performance of field cores from existing roads
    • Test laboratory compacted cores of new or experimental mixes
    • Demonstrates the effects on low temperature performance of modified binders and from adding modified to standard binders


    User friendly, intuitive and reliable Windows™ software developed using LabVIEW™.


    Accessories are not included in the price of main device (unless stated otherwise) and may be purchased separately if required.

    CRT-APTTS-AC Air Dryer and Chiller System Cryogenic air cooled version
    CRT-APTTS-PREP Specimen Preparation Kit
    CRT-APTTS-UTST Uniaxial Tensile Stress Test according to EN 12697-46
    CRT-APTTS-TCT Tensile Creep Test according to EN 12697-46
    CRT-APTTS-RT Relaxation Test according to EN 12697-46
    CRT-APTTS-TSRST TRSRT according to EN 12697-46


    Technical specifications are subject to change without notice.

    Specimen dimensions (W x D x H)
    Prismatic mm 40 x 40 x 160 – 60 x 60 x 250
    Cylindrical mm Ø 40 x 160 – Ø 60 x 250
    Cooling rate -20°C per hour as standard
    Screw jack travel mm ±150
    Transducers Displacement (AASHTO TP10)
    Range mm ±0.5
    Resolution μm 0.05
    Accuracy ±0.1% Full Scale
    Transducers Displacement (EN 12697-46)
    Range mm ±2.5
    Resolution μm 0.05
    Accuracy ±5 micron
    Load Cell
    Range kN ±25kN
    Resolution μm 1 N
    Accuracy ±10N
    Temperature Chamber
    Range °C -40°C to +40°C
    Accuracy °C ±0.5 °C
    Cooling agent Liquid nitrogen (LN2) or air chiller

    ¹ others available upon request

    Calibration & Maintenance

    Calibration, Annual Service and Maintenance Contracts are available for this device. Please enquire for further details.
    Note: This is a precision piece of testing equipment. It should be checked by a trained engineer annually.