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Bending Beam Rheometer 2S

The improved Bending Beam Rheometer (CRT-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 CRT-BBR2S beyond those of the original BBR2. Intuitive programming guides operators through test setup, providing a highly customizable and user-friendly experience.

Key Features

  • PID temperature controller with digital display
  • Two independent platinum RTDs for precisetemperature control
  • External cooling unit with temperature controller
  • Test temperatures of -40°C to 25°C
  • Three-point bend test apparatus
  • Stainless steel, corrosion-resistant construction
  • Meets ASTM D6648, BS EN 14771, and AASHTO T313 test standards
  • Computerised control, data acquisition, and analysis
  • Integral LVDT and temperature-compensated 500gram load cell
  • Optional Crack Sealant Testing Hardware

New Software & Reporting

The CRT-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 standardise right from the verification screen
  • Customisable Reports – CRT-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


Technical specifications are subject to change without notice.

Load Frame Integral stainless steel frictionless construction
Loading Shaft In-line stainless steel with blunt point
Test Load Variable test range from 0 to 200g standard
System maintains required test load within ±0.5g throughout the test cycle
Test Cycle Times Cycle times for pre-load, recovery, and test load are completely operator- adjustable
Load Cell 500g (temperature compensated)
LMechanical Overload Protection Standard
Test Weights Calibrated and traceable to NIST
Sample Supports 25mm (0.98 in.) diameter stainless steel, spaced 4.00 in. (101.6mm) apart
LVDT Displacement Transducer 0.25 in. (6.35mm) calibrated range to provide 2um resolution throughout testing and verification range
Test Weights Calibrated and traceable to NIST
Data Display Large on-screen display of load, displacement, and bath temperature provides ease of setup and operation. Real-time displacement, loading, and temperature graphs are displayed during the test cycle and can be re-plotted and re-scaled as needed for easy viewing
Cooling Unit Included (non-CFC refrigerant)
Recommended Cooling Bath Fluid Non-flammable ethylene glycol mixture
Operating Temperature Ambient to -40°F (-40°C)
Temperature Measurement Platinum RTD
Power Requirements 115VAC 60hz Standard, 230VAC 50/60Hz Optional
Compressed Air Requirements 50 psi (0.34 MPa) clean, dry air supply required
Approximate Ship Weight 250 lbs. (115kg)