HY-FPB30 Asphalt Mixture Four-Point Bending Tester

Equipment Parameters

Controller module

• The controller module, comprising the data acquisition system and control software, is the brain of the entire system. Its stable data acquisition, fully compliant data algorithms, and user-friendly human-machine interface form the control center of the entire system.
• The 4-axis/13-channel control system can simultaneously control 4 actuators and acquire data from 13 sensors.
• 16-bit AD conversion accuracy, combined with 8x oversampling technology, ensures high and stable data acquisition accuracy.
• All test results are automatically calculated, eliminating the need for manual calculation by the user.
• The fixture is equipped with a multi-frequency radar transceiver chip, featuring automatic fixture identification to prevent test failures caused by software and fixture incompatibility.
• It supports multiple control modes, including stress, strain, and load holding, with automatic switching, suitable for dynamic or static tests.
• The dynamic control frequency reaches up to 25Hz, supporting custom waveform outputs such as sine waves, square waves, and triangle waves.

Software Interface

• The four-point bending fatigue testing machine determines the fatigue life of asphalt mixtures under repeated bending loads under specified test conditions.
• Two loading waveforms are typically used: deviated sine and sine. It is generally believed that the moving wheel load produces a stress-strain effect on the road surface close to a deviated sine curve; therefore, this experimental method uses a deviated sine wave as the standard loading waveform for fatigue testing.
• The termination condition is when the product of the flexural modulus and the number of loading cycles reaches its maximum, or when the stiffness modulus decreases to 50% of the initial flexural stiffness modulus.

Hydraulic Power Station

1. Utilizes a servo motor drive, achieving precise flow and pressure supply through accurate control of pump torque and speed.

2. The servo motor speed can be adjusted according to test requirements. Its high response frequency and torque characteristics enable the hydraulic power station to quickly respond to system load changes.

3. Enables remote control and local control switching (remote control software startup; local controller with built-in startup and low-pressure/high-pressure switching functions).

4. The oil tank has a heating function, allowing preheating of the hydraulic oil during startup in low-temperature environments, accelerating system response and improving test efficiency.

5. Equipped with integrated sensors to monitor hydraulic oil temperature in real time, using a combined air-cooling and heating control method to ensure the oil temperature is consistently maintained within the ideal operating range of 40~60℃, thereby optimizing system performance and extending equipment life.

6. Through the synergistic effect of the level sensor and low-level alarm function, the hydraulic system upgrades from passive fault response to proactive health management, significantly improving operational reliability.

Specimen preparation