高黏改性沥青研究进展

Research progress of high viscosity modified asphalt

高黏改性沥青因具有黏度高、耐老化等优异的路用性能,被广泛应用于桥面铺装层、多孔沥青路面等对结合料性能要求较高的沥青混合料中。高黏改性沥青种类繁多,不同类型高黏改性沥青黏度等性能差异较大,适用场景不同。综述了不同种类高黏改性沥青的国内外研究现状,论述了不同类型高黏改性沥青的改性与增黏机理,综合比较了改性剂种类、掺量等因素对高黏沥青黏度、软化点和流变性能等关键性能的影响。最后总结了高黏改性沥青的应用场景,展望了高黏改性沥青未来研发趋势,对高性能沥青混合料铺装层路用性能的提升具有重要意义。

High viscosity modified asphalt has excellent performance such as high viscosity and aging resistance.It is widely used in bridge deck pavement,porous asphalt pavement and other asphalt mixtures with high requirements for binder performance.There are many kinds of high viscosity modified asphalt,and different types of high viscosity modified asphalt have different performance and different application scenarios.The research status of different kinds of high viscosity modified asphalt is reviewed.The modification and viscosity increasing mechanism of different types of high viscosity modified asphalt were discussed,the influences of modifier types,dosage and other factors on the viscosity,softening point and rheological properties of high viscosity asphalt were comprehensively compared.Finally,the application scenarios of high viscosity modified asphalt are summarized,and the development trend of high viscosity modified asphalt is prospected,which is of great significance for improving the road performance of high-performance asphalt mixture pavement.