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TATS Bending Beam Rheometerhe ATS Bending Beam Rheometer (BBR) is engineered to perform flexural tests on asphalt binder / bitumen and similar specimens per ASTM D6648 and AASHTO T313. These tests consist of a constant force being applied to a specimen in a chilled bath in order to derive specific rates of deformation at various temperatures. Part of the original Superpave requirements.

A complete BBR system consists of a fluid bath base unit, a three-point bend test apparatus which is easily removed from the base unit for specimen loading and unloading, an external cooling unit with temperature controller, and a calibration hardware kit with carrying case. Additionally, the BBR has recently been redesigned according to the latest revisions of the relevant ASTM and AASHTO specifications. This new design includes updated and improved software as well as features that make the BBR safer, easier, and more accurate.



  • PID temperature controller with digital display
  • Two independent platinum RTDs for precise temperature control
    • Mechanical refrigeration system
    • External cooling unit with temperature controller
    • Provides test temperatures of -40° to 25° C
  • Three-point bend test apparatus
  • Stainless steel, durable, corrosion-resistant construction
  • Calibration hardware kit with carrying case
  • Meets ASTM and AASHTO test standards
  • Computerized control, data acquisition, and analysis
  • Integral LVDT and temperature-compensated 500 gram load cell



  • Software package allows for device configuration, daily verifications, test setup, test initiation, and reporting
  • All test parameters can be revised according to ASTM/AASHTO standards for easily repeated performance
  • Two readings per second
  • Pre-load graph results before initial tests (digital)
  • The pre-test mode includes continuous contact between the loading shaft, anvils and specimen, and the applying and reapplying of 35mN and 980mN of force
  • Data acquisition system records and reports all raw data points, test specimen/setup data, and the test report standard ASCII can be recalled, printed, or imported to other software
  • Constant system error checking
  • Traceable “Test conditions” section
  • Indication of return to original load at the end of the test (daily verification and periodic calibration of the load cell, LVDT, and RTD transducers)
  • Includes program that verifies and eliminates device compliance from the specimen displacement measurements



  • gaging-kit-1Step Disk
    • Prevents movement with detent locking mechanism
    • Highest level of accuracy with precision ball bearings allowing precise repeatability by having one point of contact
  • Calibration Gaging Kit
    • 5 step disk
    • Four 50g weights, two 2g weights
    • Certified confidence beam
    • Certified compliance beam
    • Carrying case



  • Upgrades older ATS BBR’s
  • Calibration kit
  • Enhanced software