Double-layer drainage asphalt pavement pore structure attenuation law analysis method
A technology of drainage asphalt and pore structure, which is applied in the direction of roads, roads, pavement details, etc., and can solve problems such as secondary compaction of double-layer drainage asphalt pavement without consideration
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[0014] The invention provides a method for analyzing the attenuation law of the pore structure of the double-layer drainage asphalt pavement, and the specific implementation steps are as follows:
[0015] (1) Porous asphalt mixture (PA)-20 and PA-13 are used for the gradation of the asphalt mixture on the double-layer drainage asphalt pavement and the lower layer, respectively. Based on the discrete element method, the aggregate composition models of the two gradations are established. PA- 20 Only consider aggregate particles with a particle size of 20mm, 16mm, 13.2mm, 9.5mm and 4.75mm, PA-13 gradation only considers aggregate particles with a particle size of 13.2mm, 9.5mm and 4.75mm, set PA-20 Young's modulus, coefficient of restitution, and bonding radius of two graded aggregates, PA-13, are automatically calculated using discrete element software for particle mass and density;
[0016] (2) Use computer-aided design (CAD) software to establish a geometry whose length, width...
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