1Direct tensile testersummary:

The Direct Tensile Testing (DTT) system is specifically designed to evaluate the stiffness and fatigue characteristics of asphalt binders under low temperature conditions. DTT meets all AASHTO, SHRP, and FHWA Superpave specifications. To provide accurate and reproducible experimental results, the following key features have been incorporated into the system design. bitumenDirect tensile testerBy using a high stiffness loading frame and testing head, friction and errors caused by system flexibility are almost completely avoided. The test head is driven by a high-performance Exlar actuator, which can provide large dynamic response and sensitivity, while the gear motor drive system does not produce gaps or stops

Machine. All critical sensors and load cell components are isolated from the liquid bath, ensuring a safe and stable environment. Linear sensors are installed diagonally on the sample to provide accurate strain rate and position information.

IIControl and Data Collection:

Based on Windows software, it operates fully automatically and requires almost no human intervention. It is specifically designed for conducting low-temperature thermal performance tests on AASHTO TP 314 asphalt binder, capable of controlling and recording all necessary parameters. During the experiment, the experimental data can be displayed on the computer screen and stored on the disk simultaneously. The data can be easily exported to other application software, such as Microsoft Excel. Both data acquisition and closed-loop control use 16 bit digital processors to ensure accuracy and sensitivity.

IIIMain features:

Complete software package;

16 bit real-time data acquisition;

Automatic or manual operation;

Conventional and research modes;

Closed loop drive control;

High precision linear servo motor;

Computer-controlled liquid bath;

Refrigerators are optional.

Technical specifications:

Z large load: 500N;

Speed: 0.188-7500 mm/min;

Journey: 75mm;

Temperature (standard) range:+6~-25 ℃, with+6~-36 ℃ options available;

Temperature stability: ± 0.1 ℃ or higher;

Accuracy: Rate: ± 0.1% of the set value;

Force: ± 0.5% reading value.

Actuator: Exlar GSM20-0301;

8096 counting encoder;

0.1 In. cable;

1.235 × 10E-5 in./count (test speed 53 times/second);

Z is less than 10 times per second.