Aging Behavior And Mechanism Of Base Asphalt And SBS Modified Asphalt

For the excellent road performance, the SBS modified asphalt has been used more andmore widely. But with more and more asphalt pavement entering into the maintenance period,The damage of original asphalt pavement which caused by the aging of the asphalt bindercauses the people’s attention.Now the most evaluation of the modified asphalt are based on the fresh state, or aftershort-term aging, people pay less attention to long-term aging of the asphalt performance.Based on experiments and theoretical analysis, this research conducted the following works:SK70#asphalt and two SBS modified asphalt was studied by testing their conventionalperformance, and the high temperature of the modified asphalt was analysed. Based onfluorescence microscopy and image processing technology, using micro-phase structure asthe indicator and combined with analysis on performance decays after long-term andshort-term aging, evaluated the processing quality of SBS modified bitumen. The thermalanalysis was studied by the TG and the SBS modified asphalt was observed in the heatingprocess. Finally, the aging mechanism of the base asphalt and polymer modified asphalt wasanalyzed by the infrared spectroscopy.