Bending Beam Rheometer

The Bending Beam Rheometer (BBR) is used to measure the low temperature flexural creep stiffness of asphalt binders, to evaluate the ability of asphalt binder to resist low temperature cracking. The test results include low temperature creep stiffness S(t) and creep stiffness change rate m(t).

Operation and Control

• Industrial panel computer control and display, real-time display of deformation curve, pressure curve and temperature curve.
• Air source pressure, pre-pressure, load pressure and air bearing pressure are digitally displayed in the software.
• With a USB communication port which is convenient for data export.

Calibration

Equipped with LVDT calibration device, making the calibration is simple and convenient.

Cooling System

Adopts the composite cooling mode of Peltier and chiller, the cooling speed is quick. It can drop from room temperature to -18– in 40 minutes, the temperature control accuracy is high.
The chiller is connected to the host with a hose and placed separately to prevent the vibration of the chiller from affecting the test results.
A magnetic stirrer with adjustable speed is installed in the liquid bath to make the temperature more uniform.

STANDARDS COMPLIANCE :

• COMPLIED AS PER AASHTO T313, ASTM D6648, EN14771, AASHTO TP112

Construction / Material :

• The base is made of stainless steel, which is easy to clean and durable.

Displacement sensor range :

• 0~10mm

Displacement sensor resolution :

• 5mm

Pressure sensor range :

• 0~4900Mn

Pressure sensor resolution :

• 2mN

Temperature sensor range :

• 50- ~ room temperature

Temperature sensor accuracy :

• 0.1

Liquid bath temperature range :

• -40 ~ room temperature

Temperature control accuracy :

• 0.1

Liquid bath capacity :

• 5L

Stirrer speed :

• 25rpm

Mould size :

• 127-12.7-6.35mm

Top radius of sample support :

• 3-0.3mm

Loading shaft radius :

• 6.3-1.3mm spherical contact point

Number of samples :

• 1

Creep stiffness range :

• 20~1000MPa

Data output :

• USB port

Power Host ;

• AC220V 1kW power box AC220V 1.8kW; chiller AC220V 3kW

Host dimensions :

• 610-610-620 mm

Host weight :

• 80kg

• The test time can be set, which is convenient for verifying the deformation after 240s (default 240s). The time required for calculating the results can be set by software (default 8s, 15s, 30s, 60s, 120s, 240s).
• Two-stage air filtration prevents air impurities from affecting test accuracy.

Safety Features

• With overload protection, fault warning and other functions. Buzzer alarm and display fault code at the same time.