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ATS Bending Beam Rheometer 2SThe improved ATS Bending Beam Rheometer (BBR2S) is engineered to perform flexural tests on asphalt binder/bitumen and similar specimens per AASHTO T 313, AASHTO TP 87, ASTM D6648, GOST 58400.8-2019, and BS EN 14771 specifications. These tests consist of a constant force being applied to a specimen in a chilled bath to derive specific rates of deformation at various temperatures. Enhanced software and the ability to perform crack sealant tests expand the capabilities of the BBR2S beyond those of the original BBR2. Intuitive programming guides operators through test setup, providing a highly customizable and user-friendly experience.

BBR Product Update Available



  • New and improved LVDT calibration disk and weight pan as well as an enhanced software update (2.8.1 and later).
  • PID temperature controller with digital display
  • Two independent platinum RTDs for precise temperature control
  • External cooling unit with temperature controller
  • Test temperatures of -40° to 25° C
  • Three-point bend test apparatus
  • Stainless steel, corrosion-resistant construction
  • Computerized control, data acquisition, and analysis
  • Integral LVDT and temperature-compensated 500 gram load cell
  • Optional Crack Sealant Testing Hardware


The BBR2S features the newest version of our BBR software, which includes:

  • Programmable Test Parameters – amount of force, length of time force is applied, the length of time for the specimen to recover, and the specimen size.
  • Language Options – seven pre-programmed languages include English, Spanish, French, Chinese, German, Italian, and Arabic.
  • System Status Lights – clearly indicate which system components need to be verified. If verification cannot occur, the software gives users the option to standardize right from the verification screen.
  • Customizable Reports – BBR2S users now also have the ability to name their samples, enter any important notes, and upload their company logo directly into their test report. Test data available in CSV and HTML.

Unit Includes

  • Specimen Mold Kit for (5) Molds
    • Aluminum casing bars, Mylar strips, & holding bands
    • 127 mm. length, with end piece location marks
    • 6.4 mm thick, 12.7 mm wide
  • Calibration Kit
    • (1) Step disk & index
    • (4) 50 gram weights
    • (2) 2 gram weights
    • (1) Confidence beam
    • (1) Non-compliance beam
    • Wooden storage case
  • Personal computer with keyboard, mouse, and high color resolution monitor
    • Installed:
      • Latest BBR software
      • Security software and MS Office Basic


Product Specifications

Temperature Range -40 to 25°C
Operating Temperature Ambient to -40°C
Test Load Variable range from 0-200g standard within +/- .5g
Test Cycle Times Cycle times for pre-load, recovery, and test load are completely operator adjustable
Load Cell 500g (temperature compensated)
LVDT Displacement Transducer 0.25 in. (6.35 mm.) calibrated range to provide 2um resolution throughout testing and verification range
Recommended Cooling Bath Fluid Non-flammable ethylene glycol mixture
Coolant Capacity 2 gallons (7.57 liters)
Temperature Measurement Platinum RTD
Power Requirements 115 VAC 60hz standard, 230 VAC 50/60 hz optional
Compressed Air Requirements 50 psi (0.34 MPa) clean, dry air supply required
Dimensions 24.125” W X 24.125” D X 23.25” H (w/ load frame)
Weight Approximately 270 lbs.