Asphalt mixture testing machine is a specialized equipment used to test the mechanical and physical properties of asphalt mixtures. It is widely used in highway engineering, bridge construction, airport runways, and other fields to evaluate the high-temperature stability, low-temperature crack resistance, water stability, and fatigue durability of asphalt mixtures.
1. Working principle
Asphalt mixture testing machines are usually designed with an integrated host and control system, equipped with dual sensors and servo systems, which can accurately control the loading rate. Its working principle mainly includes:
1) Loading system: Apply pressure through servo motors or hydraulic systems to simulate the load under actual working conditions.
Sensors: Equipped with high-precision pressure sensors and displacement sensors, real-time measurement of force values and deformations during the testing process.
2) Temperature control: Built in temperature control system can accurately control the temperature inside the test chamber within the set range, such as 60 ℃± 0.5 ℃.
3) Data collection and analysis: Experimental data is collected, stored, and analyzed in real-time through built-in software, supporting the display of experimental curves and printing of results.
2. The asphalt mixture testing machine is mainly used for the following testing projects
1) High temperature stability test: such as rutting test, to evaluate the anti rutting ability of asphalt mixture under high temperature conditions.
2) Low temperature crack resistance test: such as low-temperature bending test, to evaluate the crack resistance performance of the mixture in low-temperature environment.
3) Water stability test: such as immersion Marshall test and freeze-thaw splitting test, to evaluate the water damage resistance of the mixture.
4) Fatigue durability test: such as four point bending fatigue test, to evaluate the fatigue life of the mixture under long-term load.
3. The design and use of asphalt mixture testing machine shall comply with the following standards
JTG E20-2011 Test Code for Asphalt and Asphalt Mixtures in Highway Engineering: specifies the test methods, equipment requirements, and operating procedures.
International standards, such as AASHTO, ASTM, and EN series standards, are applicable to the testing needs of different countries and regions.
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