The main purpose of UV aging test of road asphalt is to evaluate its weather resistance and performance stability to determine its service life and performance performance in outdoor environment. Uv aging test can simulate the effect of UV radiation in sunlight on road asphalt.

Assessing weather resistance: Road asphalt is exposed to outdoor environments and can be affected by UV rays, temperature changes, humidity, atmospheric chemicals, and other factors. Uv aging tests can simulate these factors to evaluate the weatherability of road asphalt under actual use conditions.

Assessing performance stability: UV radiation can adversely affect the chemical composition and physical properties of road asphalt, such as color change, hardening, aging, cracking, and deformation. Through UV aging test, the performance stability of road asphalt can be evaluated, and whether its performance degradation, damage or failure will occur in long-term use can be understood.

Guide material selection and formulation optimization: Through the results of UV aging test, the performance changes of road asphalt under UV radiation can be understood, so as to guide the selection, formulation optimization and improvement of road asphalt materials to improve its weather resistance and performance stability.

Ensure quality control: By conducting UV aging tests, the quality of road asphalt can be controlled and verified to ensure that it meets relevant quality standards and specifications.

Prediction of life and maintenance cycle: The service life and maintenance cycle of road asphalt can be predicted through UV aging tests and related assessments, providing a basis for road planning, maintenance and repair.

Through UV aging tests, important information about the weather resistance and performance stability of road asphalt in exposed environments can be provided, which helps to ensure that road asphalt can maintain its function and performance in various climatic conditions for a long time and provide a safe and smooth road driving experience.

This paper analyzes the application of UV aging resistance test chamber in road asphalt

Industry standards
The UV aging test of road asphalt usually requires reference to the following industry standards:

ASTM D4799: Standard test method for evaluating weather resistance of road asphalt, including UV aging test.

AASHTO T245: The American Association of Interstate Highway Traffic Officials (AASHTO) standard test method for the weather resistance of road asphalt, including UV aging test.

EN 12607-5: European standard issued by the European Organization for Standardization (CEN) on the testing of road bitumen and asphalt mixtures, which relate to UV aging testing.

JIS K 7350-4: Japanese Industrial Standard (JIS) standard for testing asphalt and asphalt mixtures for road use, including UV aging tests.

AS 2341.13: Australian standard issued by the Standards Institute of Australia (SAI Global) on the testing of road asphalt materials and asphalt mixtures, which involves UV aging testing.

Note that the exact standard requirements may vary depending on the location, industry, and specific product needs. Therefore, before conducting UV aging tests for road asphalt, the applicable standards and specifications should be carefully read and followed to ensure the accuracy and comparability of the tests. In addition, different countries and regions may have specific highway sector standards and specifications, which should also be considered in the test.

Application Cases
The following are some specific application cases of UV aging test of road asphalt:

Weather resistance evaluation: UV aging test can be used to evaluate the weather resistance of road asphalt, including changes in color, hardness, surface cracks, deformation and other aspects. This helps to determine the stability and durability of road asphalt under long-term exposure to UV radiation and other environmental factors.

Color stability: UV aging test can simulate UV radiation in sunlight to evaluate the color stability of road asphalt. By observing the degree of color change, it can be determined whether the road asphalt will have the problem of color fading or yellowing under different environmental conditions.

Physical property change: UV aging test can detect the physical property change of road asphalt, such as hardness, bending property, crack resistance and so on. This helps to assess whether road asphalt becomes brittle, prone to cracking or deforming under UV radiation.

Chemical composition change: UV aging test can detect the change of chemical composition in road asphalt, such as polymer content, asphalt quality change, etc. The chemical stability and durability of road asphalt under UV radiation can be understood by analyzing the changes in chemical composition.

Maintenance cycle assessment: The service life and maintenance cycle of road asphalt can be predicted by UV aging tests and related assessments. This helps to develop a reasonable maintenance plan, timely road repairs and updates, and improve the durability and safety of roads.

These application cases demonstrate the important role of UV aging tests in assessing the weather resistance and performance stability of road asphalt. By understanding the performance changes of road asphalt under UV radiation, corresponding measures can be taken to improve the quality and life of roads and ensure their reliability and safety.

This paper analyzes the application of UV aging resistance test chamber in road asphalt

Method of test
The following are the steps and precautions for testing the aging resistance of asphalt pavement using UV aging test chamber under normal circumstances:

Sample preparation: Select appropriate bitumen samples for testing as required. Asphalt specimens can be used or asphalt can be applied to the test plate.

Test condition setting: according to the required test conditions and standard requirements, set the parameters of the UV aging test chamber, including radiation intensity, temperature, humidity, etc. Ensure that the test chamber is set up in accordance with the relevant specifications and requirements.

Sample placement: Place the asphalt sample on the sample rack inside the test chamber to ensure that the sample is smooth, free of bubbles and wrinkles, and to avoid mutual interference between samples.

Test run: Start the UV aging test chamber and expose the sample to UV radiation under the set conditions. According to the standard requirements, set the appropriate test time, usually hundreds to thousands of hours.

Regular observation: Regular observation of bitumen sample changes, including color changes, hardness changes, surface cracks, deformation, etc. Record any visible changes or damage.

End of test and evaluation: Upon completion of the test, samples were removed for evaluation and testing. The physical and chemical properties of asphalt samples can be tested to determine their aging resistance.

This paper analyzes the application of UV aging resistance test chamber in road asphalt

When conducting UV aging test, the following matters should also be noted:

Ensure that the equipment of the UV aging test chamber is working properly, and operate according to the operation manual and safety requirements.

Check and record the temperature, humidity, radiation intensity and other parameters of the test chamber to ensure its stability and accuracy.

Ensure sample selection, preparation and placement in accordance with standards and requirements.

Check and maintain test chamber equipment regularly to ensure its normal operation and accuracy.

Take care to observe and record any changes in the sample during the test for subsequent evaluation and analysis.

Please note that the exact test methods and operating procedures may vary according to the standards and specific test requirements, so read the relevant standards carefully and follow the correct test procedures before performing UV aging tests.