This instrument is multi-functional and serves as a versatile asphalt testing device that integrates both the ductility test and the elastic recovery test for asphalt. The instrument is designed and manufactured in accordance with the following standards: 1. GB/T4508-2010 “Method for Determination of Asphalt Ductility” and T0605-2011 “Asphalt Ductility Test” from JTGE20-2011 “Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering”; 2. NB/SH/T0737-2014 “Method for Determination of Asphalt Elastic Recovery (Ductility Tester Method)” and T0662-2000 “Asphalt Elastic Recovery Test” from JTGE20-2011 “Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering.”

　　 Key technical features:

　　1. It features an industrial-grade touch screen, advanced technology, and excellent product performance.

　　2. Controlled by a 32-bit ARM microcontroller, it features automatic control of the tank temperature and automatic acquisition and processing of tensile and temperature data.

　　3. A novel stretching drive design featuring a combination of ball screws and linear guides ensures smooth, synchronized stretching without any vibration or jerking. The stretching speed is uniform, and the elongation and temperature readings are highly accurate.

　　4. It employs a high-power compression refrigeration system with a shielded, thermally balanced pressurized circulation system, ensuring rapid cooling and more uniform bath temperatures.

　　5. Equipped with a computer interface, the test data can be connected to a computer for data upload.

　　 Main technical specifications and parameters:

　　1. Power supply: AC (220 ±10%) V / 50 Hz;

　　2. Measurement range: 1.5 m (±10 mm);

　　3. Temperature control method: Refrigeration via compressor, with electric heater for heating compensation;

　　4. Bath liquid circulation: Constant-temperature control via a shielded, hot-and-cold-balanced pressurized circulation system;

　　5. Temperature control range: Adjustable from 5℃ to 50℃, with digital display and temperature resolution of 0.01℃; temperature control accuracy: ±0.1℃.

　　6. Stretching speed: two levels—10 mm/min and 50 mm/min; other speeds can also be set. Measurement accuracy: ±0.1 mm;

　　7. Has computer data upload and connection capabilities.