The Pavetest BBR is a thermoelectrically-cooled bending beam rheometer for testing flexural creep of asphalt binders from ambient to –40 °C (± 0.03 °C) . Meets or exceeds ASTM, AASHTO and SHRP requirement for low temperature flexuralcreep testing of asphalt binders including ASTM D6648 and AASHTO T313

The load is applied by a miniature servo-controlled actuator capable of applying up to +/- 10N and loading frequency from static to 25Hz, without the need for compressed air supply. The use of servo-control eliminates the need for frequent calibration and repeated adjustment of air bearing pressures. Just enter the required load and the servo-controlled actuator will apply and maintain the requested load with incredible precision. The temperature is controlled very precisely using a temperature controller mounted on the front of the machine. The user can set the bath temperature using the controller or via the software. The BBR is supplied complete with a suitable chiller to ensure a temperature range between ambient and -40°C. The heart of the system is Pavetest’s industry  Control and Data Acquisition System (CDAS) and  acclaimed (TestLab) software.

Common Applications

• Flexural creep of asphalt binders

• Low temperature characterization of crack seal under load

• EN 14771, ASTM D6648, AASHTO T313, SHRP Binder Provisions For Low Temperature Flexural Creep Testing of Asphalt Binders

Control and Data Acquisition System (CDAS)：

• High speed, (18 bit) digital servo-control.

• Computer programmable, Proportional, Integral and Derivative (PID) control algorithm.

• Adaptive Level Control (ALC) algorithm for dynamic peak accuracy.

• 3 feedback control modes. eg. force, position and on-specimen strain.

• “Bumpless transfer” between control modes.

• Analog inputs are automatically calibrated on power up.

• Simultaneous sampling of all channels.

• 64 times over sampling (set to 8 by default).

• 20 bit digital resolution acquisition system (without auto-ranging).

• Sampling rate up to 192,000/sec.

• Communication: USB or Ethernet.

TestLab Software：

• Pre-programmed “Method files”, an inexperienced operator can run a range ofinternational test methods without the need for any programming.

• Ability to clone, modify and/or generate user's own method file(s) to suit their specificrequirements.

• Programmable test “Wizard”, to guide the operator step by step based on a “recipebook” approach.

• “Simulation” mode allows the user to run any test without a specimen usingconfigurable visco-elastic specimen response model.

• Real time graphing of results and configurable real time transducer levels display.

• Configurable real time dashboard showing test setup, graph, transducer levels andresults.

• Real time “Expressions watch” allows the user to validate algorithmic processing,including intermediate calculations.

• User programmable languages using built-in language editor.

• Ability to send raw data to excel for processing and display results in software.