Ultraviolet aging test method for asphalt material in tension state
An asphalt material, aging test technology, applied in the direction of using stable torsion to test the strength of materials, analyzing materials, and using stable tension/pressure to test the strength of materials, etc., can solve the problems of poor comparability and reference, and achieve reasonable design. Effect
Active Publication Date: 2016-07-20
TONGJI UNIV
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Problems solved by technology
However, in terms of UV aging of asphalt materials, there is no uniform test procedure for reference, and there are different test equipment, test methods, and test conditions (such as ultraviolet light intensity, light time, and asphalt film thickness, etc.) among various research units and personnel. The large difference makes the test results not the same, and the comparability and reference between each other are poor
Moreover, in the above-mentioned photoaging simulation tests of asphalt materials, only ultraviolet light sources are used to photoage the statically placed asphalt materials. However, under actual conditions, the asphalt pavement exposed to light is not simply subjected to photoaging. , but under the action of vehicle traffic load, the asphalt pavement will inevitably be under tension
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Embodiment １
[0029] (1) Determination of the type of ultraviolet light source
[0030] Choose a 1kW high-intensity mercury lamp as the ultraviolet light source, and install a filter to ensure that the surface temperature of the sample is not too high, and maintain the surface temperature of the tested asphalt at 30 °C.
[0031] (2), sample preparation
[0032] SBS modified asphalt was selected as the tested asphalt, and silicone oil paper was used as the release paper. Put the SBS modified asphalt and the applicator in an oven at 170°C and heat it. After the SBS modified asphalt is in a fluid state, stir it evenly. Take about 4g and put it on the silicone oil paper to control the thickness of the asphalt thin layer. One-way paving. In this example, four kinds of SBS modified asphalt samples with thicknesses of 250 μm, 500 μm, 750 μm and 1000 μm were prepared. After the asphalt thin layer is cooled, it is covered with silicone oil paper. Then, it was divided into thin-section sample...
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Abstract
The invention relates to an ultraviolet aging test method for an asphalt material (including asphalt, asphalt mortar and an asphalt mixture) in a tension state. The ultraviolet aging test method comprises the following steps: selecting a light source for an ultraviolet aging simulation test, and determining the change of the irradiation intensity of the light source along with space and time; preparing samples of the asphalt material; carrying out an ultraviolet aging test on the asphalt material in the tension state, carrying out a subsequent performance test, and analyzing test results. By implementing the test method provided by the invention, a light aging process of an asphalt pavement under a traffic load and ultraviolet light irradiation can be well simulated; an ultraviolet light aging degree of the asphalt material can be comprehensively analyzed; the light aging rules of the asphalt material can be revealed. The test method is reasonable in design, and is detailed and specific.
Description
technical field [0001] The invention belongs to the field of highways and urban roads, and in particular relates to an ultraviolet light aging test method for asphalt materials (including asphalt, asphalt mortar, and asphalt mixture) under tension. Background technique [0002] During the actual operation, the asphalt pavement will be exposed to the external environment, and the ultraviolet radiation in the sun will make the asphalt pavement photoaging. The natural geography and environmental climatic conditions in Northwest my country, as well as the destruction of the ozone layer due to global environmental pollution and the greenhouse effect, have led to an increase in the intensity of ultraviolet radiation on the road surface year by year, and the impact of ultraviolet rays on asphalt pavement is bound to increase. On the other hand, the light aging of asphalt materials is a complex issue. Compared with the mature thermal aging research of asphalt materials, which uses r...
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IPC IPC(8): G01N17/00G01N3/08G01N3/22G01N1/28
CPCG01N1/28G01N3/08G01N3/22G01N17/004G01N2203/0003G01N2203/0017G01N2203/0021G01N2203/0026G01N2203/0236G01N2203/0282
Inventor 武金婷叶奋吴怀睿林增龙
Owner TONGJI UNIV
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