Superpave级配范围
gradation scope of Superpave
床沙级配
bed-load gradation composition
bed load gradation
gradation of bed sand
composition of bed material
size distribution
粗骨料级配
gradation of coarse aggregate
粗集料断级配
course aggregate gap gradation
CAGG
粗集料骨架级配
coarse aggregate skeleton gradation