新型高黏度改性沥青的研发和应用

The development and application of the new type high-viscosity modified asphalt

针对杭州湾大桥桥面铺装对高黏度改性沥青的技术要求,研发了一种新型高黏度改性沥青[1]。通过分析基质沥青、SBS、化学助剂的红外光谱,在研究沥青改性过程中微观结构变化规律的基础上,提出了采用SBS加化学接枝反应剂(增黏剂)TW-1和增容剂TW-2的沥青改性配伍设计,使改性沥青在提高低温延度、弹性恢复能力的同时,大幅度提升了60℃动力黏度,而施工和易性不受影响,产品在杭州湾大桥工程中得到了成功的应用。

According to the technical requirements of Hangzhou Bay Bridge deck pavement for high-viscosity modified asphalt, a new type of high-viscosity modified asphalt was developed. By analyzing the base asphalt, SBS, the infrared spectra of chemical additives, on the basis of studying the microstructure changing laws of modified asphalt in modifying process, it is proposed to use the modified asphalt compatible design, which is SBS plus chemical reaction agent tackifier TW -1 and compatibilizer TW-2, so that the low -temperature ductility and elastic resilience of the modified asphalt are improved, at the same time, the dynamic viscosity of 60℃ is greatly enhanced, and the construction will not be affected. The high-viscosity modified asphalt has been successfully applied to Hangzhou Bay Bridge project.