It is very important to determine reasonably the maximum grain size, graded sizes and gradation of the coarse aggregate.
合理确定最大粒径、分级尺寸和级配十分重要。
The results show that best permanent deformation resistance can be got when continuous dense gradation, which has even arrangement of coarse and fine aggregate is adopted.
结果表明，采用粗细集料搭配均匀的连续密级配和适中的沥青用量可以获得最佳的抗永久变形能力。
Particle shape, percentage of flat-elongated particles and gradation of coarse aggregate can produce remarkable influence on crushing value.
研究发现粗集料的粒形、针片状颗粒含量和级配都会对其压碎值产生显著影响。
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