环氧沥青粘结剂的固化行为和性能研究

Epoxy asphalt adhesives was prepared with epoxy modified asphalt. The isothermal and dynamic cure reactions, glass transition temperature（Tg）, damping properties, mechanical properties and viscosity of epoxy asphalts were investigated by using differential scanning calorimeter (DSC), dynamic mechanical analysis (DMA), universal material tester and Brookfield viscometer. The results of DSC showed that the cure reaction of epoxy asphalt adhesive belongs to auto-catalytic reactions. The addition of asphalt greatly decreased the heat of curing of epoxy. Epoxy asphalt adhesive showed a single Tg, which indicated that good compatibility between epoxy and asphalt. The Tg of epoxy asphalt adhesive was higher than that of neat aspahlt. DMA results showed that epoxy aphalt adhesive had an obvious Tg. There existed a secondary transion at lower temperature. Furthermore, epoxy asphalt adhesive showed good damping properties. The results of mechanical properties showed that epoxy asphalt adhesive had excellent tensile strength and toughness. The results of viscosity showed that the changes of viscosity during the curing of epoxy asphalt adhesive accorded with the requirement of actual application.