In modern transportation engineering such as highways, urban expressways, and airport runways, asphalt mixture is the main material for pavement structures. Its mechanical performance indicators such as dynamic modulus, phase angle, and fatigue life directly affect the long-term performance and service safety of the pavement. As a professional manufacturer in the field of material mechanics performance testing in China, Jinan Xinguang Testing Machine Manufacturing Co., Ltd. (hereinafter referred to as "Xinguang") has officially launched an upgraded series of electro-hydraulic servo asphalt fatigue testing machines with profound technical accumulation, providing high-precision and fully automatic testing solutions for the research and development, production inspection, and engineering acceptance of asphalt mixtures.
The core of fatigue performance testing for asphalt mixtures lies in accurately measuring the stress-strain response and fatigue life of the material under cyclic loading. The Xin Guang asphalt fatigue testing machine is designed strictly in accordance with national and industry standards, and has the following outstanding advantages:
1. High dynamic response performance: Using imported electro-hydraulic servo valves and high response actuators, the static/dynamic test force can reach ± 50kN to ± 300kN, and the amplitude fluctuation is not greater than ± 2% FS for each level. The actuator amplitude can reach ± 100mm, with a frequency range of 0.1-50Hz, which can meet the low cycle and high cycle fatigue test requirements of asphalt mixtures.
2. High precision measurement and control system: equipped with high-precision load sensors, the accuracy of the test force indication is better than ± 1% (level 1 accuracy), calibrated in stages according to attenuation multiples of 1 and 10, with an indication accuracy of ± 1% for each stage starting from 20%. The displacement measurement resolution is as high as 0.001mm, which can accurately capture the small deformations of asphalt mixtures during dynamic loading.
3. Fully automatic closed-loop control: adopting a multi-channel electro-hydraulic servo control system, supporting multiple control methods such as constant rate test force, constant rate stress, constant rate displacement, etc. The control methods can be randomly/arbitrarily switched between, and the PID parameters can be adjusted online. Microcomputer control coordinates hydraulic loading, automatically continuous and stable loading, automatic load holding, automatic data collection and storage, curve drawing, and computer real-time control of the test process.
4. Multi functional test accessory configuration: By configuring corresponding accessories and test software, various mechanical performance tests of asphalt mixtures can be completed, including:
-Uniaxial compression dynamic modulus test: determination of rebound modulus and Poisson's ratio
-Indirect tensile creep and strength testing: evaluation of crack resistance performance
-Bending fatigue test: determination of phase angle and bending fatigue life
-Triaxial fatigue test: simulating the actual stress state of the road surface
5. High and low temperature environment simulation system: equipped with a high and low temperature environment box with an inner cavity size of 450mm × 400mm × 600mm and a temperature range of -30 ℃~60 ℃. It can simulate the mechanical properties of asphalt mixtures under actual climate conditions and truly reflect the service behavior of materials at different temperatures.
6. Frame structure, stable and reliable: The host adopts a frame structure, and the crossbeam action adopts a hydraulic lifting, hydraulic clamping, and elastic release structure to ensure the stability and reliability of the crossbeam during the test process. The tabletop is uniformly equipped with T-shaped fixing grooves, which facilitate the fixation and clamping of samples.
The Xin Guang asphalt fatigue testing machine fully complies with the following national standards and industry specifications:
-JTJ052-2000 "Test Code for Asphalt and Asphalt Mixtures in Highway Engineering"
-T0738-2011 "Uniaxial Compression Dynamic Modulus Test for Asphalt Mixtures"
-EN12697 (European Standard for Testing Asphalt Mixtures)
-ASTMD4123, ASTMD3497 (American Society for Testing and Materials standards)
The product is widely used in the following fields:
-Road engineering research: research on road engineering materials serving universities and research institutes
-Highway quality inspection agency: carries out quality supervision and inspection of asphalt mixture products and engineering acceptance
-Road material production enterprises: asphalt mixture mix design and performance verification
-Transportation Design Institute: Provide material mechanics parameters for pavement structure design
Regarding Xinguang:
Jinan Xinguang Testing Machine Manufacturing Co., Ltd. was established in 2002 and is a national high-tech enterprise specializing in the research and development, manufacturing, and sales of mechanical testing instruments. The registered capital is 100 million yuan, the company has more than 120 employees, a building area of about 16000 square meters, and 151 sets of various large-scale CNC machining centers and specialized machine tools, with a processing and production capacity ranking among the top in the industry.
The company's main products cover a full range of categories, including electronic universal testing machines, hydraulic universal testing machines, electro-hydraulic servo fatigue testing machines, electromagnetic high-frequency fatigue testing machines, compression shear testing machines, static load anchoring testing machines, relaxation testing machines, etc. The equipment is widely used in national defense and military industries, research institutes, quality inspection institutions, and major mining enterprises, and is exported to international markets such as North America, Europe, the Middle East, Southeast Asia, and South Korea.
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