Asphalt material intelligent accelerated aging environment test device based on LED ultraviolet lamp

Abstract

The invention provides an asphalt material intelligent accelerated aging test device based on an LED ultraviolet lamp, which comprises a test box body, an intelligent control unit, a loading unit, a temperature control unit, a humidity control unit, an ultraviolet irradiation unit and a mass sensing system, the output end of the intelligent control unit is connected with the local terminal device and the personal terminal device through the information transmission module, and the natural environment is accurately and efficiently simulated to accelerate aging of asphalt materials such as asphalt and asphalt mixtures and quantify the aging degree. On the basis of considering test safety and accelerated aging efficiency and precision, the test condition and natural environment simulation can be realized, the functions of monitoring the aging test box, checking the working state and recording the change of a test sample in real time are met, and the device is convenient to operate, high in aging efficiency, high in measurement precision and safe in working environment.

Description

technical field [0001] The invention belongs to the technical field of asphalt performance testing devices, in particular to an intelligent accelerated aging environmental test device for asphalt materials based on LED ultraviolet lamps. Background technique [0002] Asphalt pavement materials are exposed to the natural environment, and they are subjected to external environmental factors such as sunlight, alternating cold and heat, and freeze-thaw cycles all year round, which will lead to aging. The aging of asphalt materials will undergo a series of volatilization, oxidation, polymerization and even changes in the internal structure of asphalt, resulting in the deterioration of pavement performance and shortening the service life. [0003] To study the durability and service life of asphalt materials, natural aging and artificial accelerated aging methods are generally used. The main factors to be considered for artificial accelerated aging are sunlight ultraviolet radiat...

AI Technical Summary

Problems solved by technology

[0004] 1. The temperature, humidity, and radiation intensity of the test box environment are uneven, resulting in uneven aging of the sample

[0005] There is a delay in the measurement of temperature, humidity, and ultraviolet radiation intensity control components and measurement components, resulting in uneven temperature, humidity, and radiation intensity in the environmental chamber

The degree of UV aging is significantly affected by distance and temperature, but because the position of the specimen is relatively fixed, the specimen close to the heating element and UV lamp is more prone to aging

[0006] 2. The spatial distribution of the irradiance intensity of the ultraviolet lamp is uneven, and the replacement of the light box is inconvenient

[0007] Most indoor asphalt UV aging light sources use ring-shaped UV light sources or strip-shaped UV light sources. The intensity of UV light gradually decreases from the center of the light source to the edge, resulting in uneven spatial distribution of UV light and low utilization.

[0008] Ultraviolet light lamps are consumables with a high frequency of replacement. Most ultraviolet lamps in aging test chambers are fixed on the top of the aging test chamber, which brings inconvenience to the replacement of light boxes.

[0009] 3. The working environment and sample status of the aging test chamber lack real-time monitoring and recording

[0010] Aging test chambers seldom consider the setting and monitoring of aging environmental parameters, and the intensity of ultraviolet lamps will attenuate after long-term use. It is difficult for ordinary aging test chambers to achieve aging of asphalt materials when the temperature, humidity and ultraviolet intensity are unstable. The precise quantification of the degree cannot fully understand the factors affecting the aging of asphalt materials

[0011] 4. Poor safety: The problem of ultraviolet radiation injury is not considered. At the same time, the ultraviolet aging test box has a long power supply time and generates heat, which not only affects the ultraviolet aging effect, but also has poor simulation test results, and is very prone to safety problems.

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