老化SBS改性沥青再生性能试验研究

发布时间：2019-02-18 09:58

【摘要】：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。
[Abstract]:In order to reveal the regeneration law of aging SBS modified asphalt and guide the design of recycled asphalt, the properties of new SBS modified asphalt and regenerative aging SBS modified asphalt were tested, and the properties of recycled asphalt and new asphalt were regressed. The relationship between the amount of regenerant and the amount of regenerator. The results show that the high temperature performance of recycled SBS modified asphalt is good, and the low temperature performance can not be effectively improved. The new SBS modified asphalt and regenerative compound regeneration method must be adopted. Due to the difference of the crosslinking network structure of SBS modifier before and after aging, the softening point of regenerated SBS modified asphalt shows a reverse trend with the increase of new asphalt and regenerating agent content. The nonlinear relationship between viscosity, penetration and the content of new asphalt and regenerative agent of recycled SBS modified asphalt can be described by two-phase liquid mixing model. There is a good linear and exponential relationship between ductility and the content of new asphalt or regenerative agent.
【作者单位】：长沙理工大学道路结构与材料交通行业重点实验室;湖南省通盛工程有限公司;
【基金】：国家自然科学基金资助项目,项目编号51178065 湖南省交通科技计划项目,项目编号201504
【分类号】：U414

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