Component isolation characterization of high elastic modified asphalt using attenuated total reflectance infrared spectroscopy

The macro properties of two kinds of high elastic asphalt were tested, results show that the ductility, penetration and -10℃ bending strain of high elastic 1# modified asphalt decrease rapidly over time, while softening point increases. On the contrary, the macro mechanical properties of high elastic 2# modified asphalt basically remain unchanged. Furthermore, the infrared attenuated total reflection method (ATR) combined with quantitative analysis of infrared spectrum were applied to characterize the component precipitation of both high elastic modifiers, the results indicate that high elastic 1# precipitates from asphalt to the surface, and the precipitation increases over time. In contrast, no phenomenon of high elastic 2# precipitation is observed, indicating the precipitation resistance of high elastic 2# is better than that of high elastic 1#. The analysis suggests that the properties reduction of high elastic 1# modified asphalt stems from the precipitation of high elastic 1#. © 2016, Editorial Board of Polymer Materials Science & Engineering. All right reserved.