Overview

The Asphalt Penetration Tester is an instrument designed using advanced capacitive digital dial indicators combined with CNC circuitry to measure asphalt penetration. This instrument complies with the People’s Republic of China’s transportation industry standard JTG 3410–2025, “Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering” — “Asphalt Penetration Test.” It is simple and convenient to use, requires no preheating, and provides a high‑precision, state-of-the-art instrument for applications in China’s highway, municipal, construction, and petroleum industries.

Uses

This instrument is primarily used to determine the penetration of viscous road petroleum asphalt, liquid petroleum, asphalt, and asphalt materials after distillation or emulsification tests, as well as their residual products.

Main Technical Specifications of the Instrument

Use of the Instrument

“Set” button: Sets the descent time. Press the “Set” button to display the descent time on the screen; then, pressing the “Start” button increases the descent time by 1 second, while pressing the “Manual” button decreases the descent time by 1 second.
“Start” button: Used to initiate the test. After setting the penetration time, press this button to start the test. On other pages…
Below, the function of this key has been redefined.
“Manual” Key: When pressed in the test interface, this key activates the electromagnet that locks the needle rod, releasing the lock and allowing the needle rod to move freely.
Release this key to lock the needle bar. On other pages, the function of this key is redefined.
“Lighting” button: Press once to turn the lighting on, then press again to turn it off.

Operating Procedures

1. Adjust the needle penetration tester to ensure it is level.
2. Fill the glass constant‑temperature water bath with water to about the level of the glass bath opening, then place the water bath on the chassis platform.
3. Transfer the specimen that has reached the required constant temperature onto the triangular support in the glass water bath, then slowly adjust the height of the displacement sensor bracket. Attach the standard needle of the penetration tester so that the needle tip just touches the surface of the specimen. Press the start button to begin the test; the instrument will automatically complete one penetration cycle.
4. After completing three trials, take the average of the three sets of test data as the test result.
5. The instrument is set to a curing temperature of 25°C and a penetration time of 5 seconds.
6. After each test, the instruments must be cleaned and dried promptly.

Notes and Precautions

1. Before each test, the water temperature in the保温 dish should be checked and adjusted. After the test, the installed standard needle should be removed and cleaned with cotton or cloth soaked in a solvent (benzene or gasoline); then wipe it dry with cotton or cloth and store it in a dry place.
2. If any instrument components are damaged or lost, please contact our sales representative; do not attempt to disassemble the instrument yourself.
3. To ensure safety, please use a power source with a ground wire.