Research on Characterization of 3D Morphology of Coarse Aggregate Based on Laser Scanning

The morphology of coarse aggregate has a significant impact on the road performance asphalt mixtures and characterization studies, but many studies were based two-dimensional aggregate, which failed to consider morphological characteristics in holistic manner. In order quantitatively analyze shape, angularity, texture roadway aggregates, rapid accurate multiparameter method 3D is explored this article. A laser scanner used obtain point cloud data pebble, granite, basalt, solid models three aggregates are reconstructed. addition, fitted ellipsoidal algorithm Laplace smoothing proposed for analysis overall surface roughness variation rules multicharacteristic parameters summarized. results study show that ratio axes ellipsoid can be classify shape into four types, among cubic accounts majority aggregate. By analyzing value change rate angularity it concluded larger values both, more angular is. Moreover, finds characterize not only also its some extent. Compared with spherical value, better variability “sensitive” data. area well When particle size small, basalt largest. influence was adequately considered previous asphalt-aggregate adhesion, provides parameter help subsequent quantitative relationship between adhesion morphology.