SB S改性沥青耐久性研究现状综述

摘要

基于国内学者对于SBS改性沥青耐久性的最新研究成果，总结归纳了在热氧、紫外光、水以及耦合条件下，SBS改性沥青的老化机理、性能变化及特性，并对今后的研究方向提出建议。结论如下：在上述几种条件下，SBS改性沥青的老化机理相似，均是由于其中的SBS聚合物老化和基质沥青老化两方面效应综合作用的结果；在上述几种条件下老化后的SBS改性沥青，三大性能指标变化一致，即针入度和延度降低，软化点升高。水的存在可促进SBS改性沥青的老化，并且随着水量增加，老化加剧。今后应加强对SBS改性沥青水老化和耦合老化的研究。%According to the latest research on the durability of SBS modified asphalt,this paper summarized the aging mechanism,performance changes and characteristics of SBS modified asphalt in conditions of thermal-oxidative,ultraviolet,water and coupling. The conclusions were as follows: in these conditions,the aging mechanism of SBS modified asphalt were similar,which were due to the combined effects of two aspects of SBS polymer aging and matrix asphalt aging;In these conditions,three performance indices had same trend after SBS modified asphalt aging,the penetration and ductility decrease,softening point increase;water would promote SBS modified asphalt aging,and the aging would be intensified as the amount of water increases;we should strengthen the research on water aging and coupling aging of SBS modified asphalt.