Identification of ballast grading for rail track
01/10/2017#0183;#32;Limited attention ( Bian et al., 2016, Indraratna et al., 2016) has been paid to fundamentally modifying the ballast aggregates themselves, the gradings for better track performance. However, grading has long been recognised as one of the most important characteristics that directly influence the mechanical performance of ballast, the drainage ( Bian et al., 2016 ), shear resistance (