Specifications met: AASHTO T313, AASHTO T368, AASHTO TP122, AASHTO TP125, ASTM D6648, SHRP, JTG E20 T 0627-2011
Pavetest's BBR is a thermoelectric low-temperature asphalt bending beam rheometer for testing the bending creep test of asphalt cement at room temperature to -40°C. The load is applied by a miniature servo-controlled actuator that can apply a load of +25N and the loading frequency can range from static to dynamic 25Hz, without the need to configure an air compressor to supply compressed air.
The asphalt bending beam rheometer is servo-controlled, eliminating the need for frequent calibration and repeated adjustment of the pressure of the air bearing. Simply enter the required load value and the servo-controlled actuator is applied with incredible speed accuracy and keeps the set load stable. The temperature can be precisely controlled using a temperature controller mounted on the front of the machine.
The bath temperature can be set using the controller or via software. At the heart of the asphalt bending beam rheometer system is Pavetest's Control and Data Acquisition System (CDAS2) and (TestLab) software.
use
Asphalt bending beam rheometer accurately measures the bending creep accuracy and creep rate curve of asphalt at the lowest road temperature, which is used to evaluate the low-temperature cracking performance of asphalt, focusing on reflecting the ability to resist temperature contraction cracking and avoid low-temperature cracking of the road surface. Suitable for non-modified asphalt, can test the principle of asphalt, asphalt after pressure aging test and aging asphalt after the test of rotating film oven (or film oven).
General applications
• Bending creep test of asphalt cementitious material
• Low temperature characteristics of crack sealing under load
• Meets ASTM D6648, AASHTO T313 and SHRP asphalt test gauge asphalt cement low temperature deflection creep test
Product features
The servo-controlled design of the asphalt bending beam rheometer eliminates the need for frequent calibration and repeated adjustment of the pressure of the air bearing
Load frequency from static to dynamic 25Hz
There is no need to provide compressed air with an air compressor
Direct thermoelectric cooling with external solid-state Peltier Paterson system (fluorine-free)
Designed with a separate air-water heat exchanger
Integrated free-standing bath for cooling using ethanol as bath medium
Set and monitor the water bath temperature via software control
Technical advantages
• Adopt Pavetest CDAS2 high-performance controller
• Built-in compact data
• Controller Number of controller channels: 8 channels; Number of controller axes: 2 axes
• Sampling frequency: 192kHz with up to 64x oversampling capability, 20x digital resolution
Powerful testing software
1. With Chinese and English software, and users can define and modify the Chinese font library
2. User-friendly interface, with guidance function, to help ordinary operators easy to experiment setup and entry operation. With a "menu-based" guided programming design, feedback prompts can guide the operator to test the programming step by step
3. Can copy, modify and generate user-defined test templates, all test standard specifications and calculated algorithm formulas are open to users, users can change and write their own parameters and formulas, arbitrary programming and custom test methods to meet the user's special test needs
4. With simulation function, the test process can be rehearsed after the operator's programming, without the need for real specimens, to ensure that the test program written by the operator will not destroy the effective specimen and damage the equipment
5. Programmable control: the size of the load, the duration, the recovery time, the specimen size can be controlled
Thermoelectric temperature control system
Thermoelectric temperature control system is adopted, the cooling speed is faster, the accuracy is higher, the system is higher, and the reliability and environmental protection are more environmentally friendly.
Magnetic bearings
The use of a new generation of magnetic bearings, more stable and reliable, higher precision, longer life.
Extended functionality
• BBR upgrade packages (magnetic bearing systems, Chinese software systems, controllers) are available, other brands of asphalt bending beam rheometer BBR equipment can be upgraded, and upgraded brands include Cannon, ATS, etc.
• Controller and software can be compatible with DTS systems, achieving the most equipment software and system compatibility and unified data management in the laboratory; Other brands of UTM systems can be upgraded, including MTS, Instron, Controls, IPC, Cooper, etc.
Control and Data Acquisition System (CDAS2)
▍ High-speed (18-bit) digital servo control, can control 4 axes
▍ Digital closed-loop control, sampling rate 2.5kHz
▍ External computer programmable control, proportional, integral and differential (PID) control algorithms
▍ Adaptive Control (ALC) algorithm to ensure the best dynamic peak accuracy
▍ 3 feedback control modes, such as load, position and specimen surface strain control
▍ Seamless switching between various control modes
▍ Computer programmable digital loading waveform
▍ The full acquisition channel automatically calibrates the input signal when powered on
▍ Simultaneous sampling of 16 analog signals (10 volts) input acquisition channels for all channels
▍ Up to 64x oversampling technology (default setting 8x)
▍ 20-bit digital high-resolution acquisition system (no automatic range)
▍ Sampling rate up to 192kHz
▍ Communication port: USB or Ethernet connection
Testlab software
• Pre-programmed "test method" files that facilitate operators with no experimental experience to run tests of multiple international specifications without any programming
• User-owned test methods can be copied, modified and/or generated to meet customer-specific experimental needs
• Programmable test "wizards" to guide operators step-by-step through experiments based on a "feedback-based" approach. Programming control: The size of the load, the duration, the time of recovery, the size of the specimen can be controlled
•Simulation mode allows users to perform any test without a sample using the Set Sample Response Model
• Real-time graphical display of experimental results and configurable real-time display of sensor data
• Configurable, real-time dashboard showing test settings, charts, sensor values, and experimental results
• Real-time "Expression watchs" enable users to verify algorithmic processing, including intermediate computations
• Parameter tracking function that allows automatic transfer of test parameters and results between test methods
• Using the built-in language editor (including Chinese and English software), users can modify the description of the software language
• Ability to send raw data to excel for post-processing and display the results of post-processing in the software
Pavetest can upgrade your old BBR bending beam rheometer!
For more knowledge and equipment related to road traffic civil engineering and geotechnical engineering, please contact @TIPTOP Zhuo Tian!