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Asphalt bending beam rheometer
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Introduction
The LHLB-0627 Asphalt Bending Beam Rheometer is developed by Beijing Lanhang Zhongke Measurement and Control Technology Research Institute based on the requirements of "Highway Engineering Asphalt and Asphalt Mixture Test Regulations JTG E20-2011", "AASHTO T314-07 Bending Beam Rheometer (BBR) Determination of Asphalt Bending Creep Stiffness Test Method", and "Highway Asphalt Pavement Design Code JTGD50-2017". It utilizes microcomputer automatic control technology, high-precision sensor technology, refrigeration technology, and electrical servo technology. It primarily uses direct tensile testing to determine the failure strain and failure stress of asphalt binder. This method can be used for unaged or aged materials using T240 (RTFOT) and R28 (PAV). The temperature range of the instrument used for the test is +6～-36℃. This test method is limited to asphalt binders with particles smaller than 250μm. The instrument has a compact structure, beautiful appearance, and the microcomputer performs fully automatic testing of the entire process.
Functions and Features
1. Windows-based software, fully automatic operation, requiring virtually no operator intervention. It is specifically designed for low-temperature thermal performance testing of asphalt binders and can control and record all necessary parameters. During the test, the test data is simultaneously displayed on the computer screen and stored on the hard drive. Data can be easily exported to other application software, such as Microsoft Excel.
2. Data acquisition and closed-loop control both use a 24-bit digital processor, ensuring accuracy and sensitivity.
3. Uses high-precision imported regulating valves, with fully digital high-precision control.
4. Uses a high-precision laser displacement sensor to independently monitor displacement deformation.
5. The test tank cooling and constant temperature control uses an external circulation structure to reduce the vibration caused by the compressor on the equipment, thus reducing errors in sensor readings.
System Composition
This instrument consists of a host, a low-temperature refrigeration circulator, a computer, and measurement and control operating software.
Main Technical Indicators
1. Pressure sensor range: 500g (4900mN)
2. Load resolution: 0.1mN
3. Load accuracy: ±1.0%
4. Laser displacement sensor range: 0-10mm;
5. Displacement sensor resolution: 0.001mm
6. Displacement sensor measurement accuracy: ±1.0%;
7. Constant temperature water bath temperature control range: ＋20～-36℃;
8. Temperature control accuracy: ±0.1℃;
9. Contact load: 35mN±5mN;
10. Contact load: 980mN±50mN;
11. Sample size: 12.7*6.35*127mm;
12. Specimen support: 6mm diameter stainless steel, spacing 102mm±1mm;
13. Loading shaft: with a spherical contact point with a radius of 6.3±1.3mm;
14. Loading method: direct loading on the specimen controlled by a microcomputer;
15. The constant temperature water bath and refrigeration unit adopt a split structure to eliminate the vibration of the refrigeration compressor
affecting the sensor;
16. The microcomputer software automatically controls and automatically collects data, and draws the stress-strain curve in real time,
17. Automatically completes the entire test process according to the set program, automatically calculates the failure stress and
18. Failure strain, with data analysis, storage, and report printing functions;
19. External compressed air supply: supply pressure is 0.8MPa;
20. Host power: 1kW;
21. Host power supply: 220V×50Hz, 10A;
22. Dimensions:
Asphalt Bending Beam Rheometer: 60×55×60cm (length×width×height)
Low-temperature circulating chiller: 70×63×66cm (length×width×height)
- Overall weight:
Asphalt Bending Beam Rheometer: 50kg
Low-temperature circulating chiller: 65kg
- Overall weight:
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Asphalt bending beam rheometer
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