Research on Three-Dimensional Morphological Characteristics Evaluation Method and Processing Quality of Coarse Aggregate

The size, shape, gradation and appearance of aggregate have a significant impact on the road performance asphalt mixtures, which is directly related to deformation characteristics fatigue resistance mixtures. In order be able design long-life pavement, must reasonable morphology morphological characteristics. quantitatively analyze shape coarse aggregate, high-precision three-dimensional scanner used obtain characteristic lattice surface, solid model particles established. two-dimensional indicators are analyzed discussed. Meanwhile, aggregates processed by typical quarries in Guangdong Province collected, influence different processing techniques analyzed. results show that difference between perimeter projected area contour under viewing angles relatively large, closely flatness index aggregate. It can better characterize closer cubic state, greater sphericity value; ellipsoid calculated based circumscribed angularity worse larger corresponding value. counter-breaking lower, better. shaping process best, but lower. According actual needs, combined blended finished products with more balanced grain angularity. richer high-temperature stability mixture. However, will become worse. practical engineering applications, it recommended further combine screening efficiency hot material screen mixing plant uniformity construction quality select suitable technology.