Exploration of the Influence of SBS Relative Molecular Mass on the Performance of Modified Asphalt
In order to clarify the effect of star and linear styrene butadiene styrene block polymer(SBS)with different relative molecular weights on the performance of modified asphalt,modified asphalt with different relative molecular weights was prepared by internal blending method(5％content).The results show that the addition of SBS has a significant promotional effect on improving the performance of asphalt,which is mainly marked by the improvement of three key indicators such as penetration,softening point and ductility,as well as the improvement of high temperature rheological performance.At the same time,there are differences in the performance improvement of modified asphalt by SBS with different relative molecular weights.Within a certain range,SBS with a higher relative molecular weight exhibits better performance improvement effect.It can be seen that for road projects with different needs,choosing the appropriate SBS relative molecular weight has important guiding significance for optimizing the performance of asphalt materials and improving the quality and durability of road projects.
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