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为揭示老化SBS改性沥青的再生规律和指导再生沥青设计,分别测试了应用新SBS改性沥青和再生剂再生老化SBS改性沥青的性能,并回归了再生沥青性能与新沥青、再生剂掺量的关系。研究结果表明,再生SBS改性沥青的高温性能好,低温性能不能得到有效地改善,必须采取新SBS改性沥青与再生剂复合再生方式。由于SBS改性剂交联网络结构在老化前后的差异,再生SBS改性沥青软化点随新沥青和再生剂掺量的增加呈现出相反的发展趋势。再生SBS改性沥青的黏度、针入度与新沥青、再生剂掺量之间非线性关系可采用两相液体混溶模型描述,软化点、延度与新沥青或再生剂掺量之间分别具有良好的线性和指数关系。
In order to reveal the regeneration rules of aged SBS modified asphalt and to guide the design of recycled asphalt, the performance of regenerated aged SBS modified asphalt with new SBS modified asphalt and regenerant was tested respectively. The performances of recycled asphalt with those of new asphalt and recycled agent The amount of relationship. The results show that regenerated SBS modified asphalt has good high temperature performance and low temperature performance can not be effectively improved. Therefore, it is necessary to adopt a new composite regeneration mode of SBS modified asphalt and regenerant. Due to the difference of the SBS modifier crosslinked network structure before and after aging, the softening point of regenerated SBS modified asphalt shows the opposite trend with the increase of the content of new asphalt and regenerant. The nonlinear relationship between the viscosity and penetration of regenerated SBS modified asphalt and the content of new asphalt and regenerant can be described by the two-phase liquid miscibility model. The softening point, ductility and content of new asphalt or regenerant respectively Has a good linear and exponential relationship.