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- Title
沥青混合料永久变形过程中粗集料空间运动分析.
- Authors
张德育; 白桃; 黄晓明; 高英; 洪锦祥
- Abstract
A three-dimensional(3D) generation procedure for randomly created irregular polyhedron coarse aggregates was developed, and a 3D discrete element(DE) model of asphalt mixture(composed of coarse aggregates, asphalt mastic and air voids) specimen in rutting test was reconstructed. The two-dimensional(2D) DE model of asphalt mixture specimen in rutting test was constructed by cutting numerically the 3D DE model. The corresponding micro contact models and parameters were given for the interactions of microscale components of 2D DE model of asphalt mixture specimen in rutting test. The rutting test of asphalt mixture was simulated using the 2D DE model. Finally, the translation and rotation of coarse aggregates during permanent deformation of asphalt mixture were analyzed. It is found that the 2D DE model can more accurately describe the space movement of coarse aggregates during permanent deformation of asphalt mixture, and provide a new research method for investigating the rutting mechanism of asphalt mixture.
- Publication
Jianzhu Cailiao Xuebao: Journal of Building Materials, 2015, Vol 18, Issue 3, p421
- ISSN
1007-9629
- Publication type
Article
- DOI
10.3969/j.issn.1007-9629.2015.03.011