Method for testing high-temperature performance difference of asphalt mixtures after crushing of coarse aggregates
A technology of asphalt mixture and high temperature performance, applied in the direction of material inspection products, etc., can solve the problems of changing the performance of asphalt mixture, affecting the performance and use quality of asphalt mixture, etc.
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Embodiment 1
[0040] Example 1, Test of Asphalt Mixture Grading Variability after Coarse Aggregate Crushing
[0041] 1. AC-20C asphalt mixture is used in the surface layer of a highway, the crushing value of limestone coarse aggregate is 24%, and the content of needle flake particles is 16%, all of which meet the "Technical Specifications for Construction of Highway Asphalt Pavement" (JTGF40-2004) Table 4.8.2 has technical requirements for the quality of coarse aggregate for asphalt mixture, which is close to the upper limit of the allowable range;
[0042] 2. At the construction site, 2kg of mixture was randomly selected from the auger of the paver, and separated from the mixture according to the test method T0722-1993 of "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTJ 052-2000) asphalt;
[0043] 3. According to the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTJ052-2000) T0725-2000 test method, sieve the mixed mineral materi...
Embodiment 2
[0047] Example 2, High temperature deformation resistance test of asphalt mixture after coarse aggregate crushing
[0048] 1. AC-20C asphalt mixture is used in the surface layer of a certain expressway that is the same as Example 1. The crushing value of limestone coarse aggregate is 24%, and the content of needle-like particles is 16%, all of which meet the requirements of "Highway Asphalt Table 4.8.2 of Technical Specifications for Pavement Construction (JTGF40-2004) has technical requirements for the quality of coarse aggregate for asphalt mixture, which is close to the upper limit of the allowable range;
[0049] 2. At the construction site, 6 core samples were randomly selected. First, the diameter, height and gross volume of the core samples were measured according to the test method T0705-2000 of "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTJ 052-2000). Density, the test results are shown in Table 1, and then, according to the test metho...
Embodiment 3
[0052] Example 3, Water Stability Test of Asphalt Mixture after Coarse Aggregate Crushing
[0053] 1. AC-20C asphalt mixture is used in the surface layer of a certain expressway that is the same as Example 1. The crushing value of limestone coarse aggregate is 24%, and the content of needle-like particles is 16%, all of which meet the requirements of "Highway Asphalt Table 4.8.2 of Technical Specifications for Pavement Construction (JTGF40-2004) has technical requirements for the quality of coarse aggregate for asphalt mixture, which is close to the upper limit of the allowable range;
[0054] 2. At the construction site, 12 mid-surface core samples were randomly selected, and the diameter D and height h of the samples were measured. The test results are shown in Table 3. The samples were randomly divided into 2 groups, 6 in each group, and the first The group of samples is placed on the platform and stored at room temperature for later use;
[0055]3. According to the test m...
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