The improved ATS Bending Beam Rheometer (BBR2S) is engineered to perform flexural tests on asphalt binder/bitumen and similar specimens per ASTM D6648, BS EN 14771, 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. 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.


  • Part of our CE Approved Asphalt Bitumen/Binder Testing Line
  • PID temperature controller with digital display
  • Integral stainless steel, corrosion resistant construction
  • Leveling legs
  • 500 gram load cell with mechanical overload protection
  • 0.25 in. Linear Variable Displacement Transducer (LVDT)
  • (2) 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
  • Meets ASTM D6648, BS EN 14771, and AASHTO T313 test standards
  • Computerized control, data acquisition, and analysis
  • Real time displacement, loading, and temperature graphs
  • Load frame featuring integral stainless steel friction-less construction
  • In-line stainless steel loading shaft with blunt point
  • Optional crack sealant testing hardware
  • Mechanical refrigeration system
  • Cooling coil located in test bath – no pumping required
  • Newest version of our BBR software
  • Programmable force, length of time force is applied, length of time for specimen recovery, and specimen size
  • Languages available: English, French, German, Spanish, Italian, Chinese, and Arabic
  • Customizable test reports
  • VNC Viewer- Remote monitoring capabilities with smart phone or tablet app


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.

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