Micro-compaction simulation of ultra-thin and anti-slip sealing layer based on DEM and 3D reconstruction
In order to study the compaction mechanism of ultra-thin anti-slip sliding sealing layer and gravel distribution,the contour scanning and 3D reconstruction of real gravel particles were carried out by CT scanning and 3D reconstruction technology.On this basis,EDEM discrete element software was used to establish the model of convex polyhedron particle and compaction,and the changes of parti-cle topology,contact force and coordination number during compaction were analyzed by particle contact dynamics.Results show that the airvoid of three-dimensional reconstruction models is consistent with the actual situation.The topology evolution is connected with the col-or and thickness of contact vectors during compaction.Moreover,the average contact force and coordination number of particles keep in-creasing and stabilizing with loading.Therefore,gravel particles can form solid embedded structure and ensure the anti-sliding performance and spalling resistance of pavement.
asphalt pavementultra-thin anti-slip sealing layersimulation of compactionDEM3D reconstruction
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