The low-temperature shrinkage and cracking performance of asphalt pavement is related to the creep stiffness of asphalt binders and the slope of the logarithmic and time logarithmic curve of creep stiffness.

The TBTBBR-1 bending beam rheometer is a device that uses the SHRP method to test the flexural creep stiffness of asphalt binders in low-temperature conditions. As a result, it's utilized to assess asphalt binders' low-temperature cracking properties. The test results include the low-temperature creep stiffness S(t ) and creep stiffness change rate m(t) index.

• Adopts industrial computer, deformation curve, pressure curve and temperature curve displayed in real time.
• With LVDT calibration device which makes calibration process simple and convenient.
• Dual mode of Peltier and refrigerator for cooling can realize rapid cooling from room temperature to -18°C in 40 minutes.
• To reduce vibration, the refrigerator is separated from the main unit by a hose.
• A magnetic stirring rotor with adjustable speed is installed in the liquid bath which makes the liquid bath temperature accurate and uniform.
• The air pressure, pre-pressure, loading pressure and air axle bearing pressure can be displayed in software.
• With USB communication port, data is exported easily.
• With overloading alarm and fault warning alarm function. The buzzer alarms and fault code will display at the same time.
• The stainless steel base box is durable and easy to clean.
• The testing time can be set to verify the deformation after 240s (default: 240s).
• The timing for calculating result can be set by software (8s, 15s, 30s, 60s, 120s, and 240s by default).
• Two-stage high-precision air filter prevents air impurities from affecting the test accuracy.

TBT-0728 bending beam rheometer is used to evaluate the deformation performance of bituminous mixtures at a specified temperature.

• Loading capacity: 0~300N
• Loading measuring error: ≤±0.1N
• Measuring range: 0mm~20mm (mid-span deflection)
• Measuring bias: ≤±0.01mm
• Temperature control range: -20℃~60℃
• Temperature control bias: ≤±0.1℃
• Motor power: 90W
• Compressor power: 1kW
• Heating power: 2kW
• Pump power: 45W
• Communication port: RS232
• Power supply: AC (220±10%)V, 50Hz
• Total consumption power: 3.2kW
• Outline dimension: 810×540×1300mm(LxWxH)
• Net weight: 86kg