Based on the review of the existing specifications home and abroad, rubber gradation is decided, which obtained by mixing two types of crumb rubber in a certain proportion.

• 文中通过对国内、外现有规范的总结，首先确定出试验胶粉的级配，并选用两种规格的胶粉按比例掺配得到试验所用的废轮胎胶粉改性剂。