本指南规范描述了三种基于不同类型常用聚合物的聚合物改性沥青。虽然本规范不是基于性能的指南，但它描述了性能令人满意的材料

This guide specification describes three types of polymer modified asphalts based on different types of commonly used polymers. While this specification is not a performance based guide, it describes materials for which satisfactory performance has been