温拌剂的种类和橡胶粉细度对温拌橡胶沥青性能影响

Effect of Types of Warm Mix Agent and Fineness of Rubber Powder on the Performance of Warm-mixed Rubber Asphalt

为掌握温拌剂类型和橡胶粉细度对温拌橡胶沥青性能的影响,制备不同类型温拌橡胶沥青,通过布氏旋转粘度、软化点和延度等试验对其粘温性能、高温性能和低温性能分别进行研究。结果表明:橡胶粉细度和温拌剂类型对温拌橡胶沥青粘度有显著影响,且橡胶粉细度影响程度更大,其中橡胶粉细度增加时橡胶沥青粘度提高;ZYF、Sasobit和Evotherm对橡胶沥青的降粘效果依次变差,同时橡胶粉细度增加时三者降粘效果均降低;Sasobit能有效提高橡胶沥青高温性能,Evotherm和ZYF则对其高温性能有不利影响,而三种温拌剂对低温性能的影响与高温性能正好相反;橡胶粉细度增加时其制备的沥青高温性能和低温性能均提高。

In order to master the effects of types of warm mix agent and fineness of rubber powder on the performance of warm-mixed rubber asphalt,the different types of warm rubber asphalt were prepared.The viscosity-temperature performance,high temperature performance and low temperature performance were studied by Brinell rotation viscosity,softening point and ductility tests.The results showed that the fineness of the rubber powder and the types of warm mix agent had a significant effect on the viscosity of the warm-mixed rubber asphalt,and the effect of the fineness of rubber powder is greater.The viscosity of the rubber asphalt increased when the fineness of the rubber powder increased.The viscosity reduction effect of ZYF,Sasobit and Evotherm on rubber asphalt was deteriorated in turn,at the same time,when the fineness of rubber powder increased,the viscosity reduction effect of three kinds of warm mix agent decreased.Sasobit can effectively improve the high temperature performance of rubber asphalt,and Evotherm and ZYF had adversely affect on its high temperature performance,and the effect of the three warm agents on the low temperature performance was the opposite of the high temperature performance.When the fineness of the rubber powder increased,both the high temperature performance and the low temperature performance of the prepared asphalt were improved.