摘要
以不同组成的相容剂制备了SBS改性沥青样品,通过常规性能试验、动态剪切流变试验、荧光显微镜评价了其老化前后的性能及微观结构的变化情况.结果表明:相容剂中芳香分含量越高,改性沥青的高温性能越好,而饱和分含量越高,改性沥青的低温性能越好;老化后,相容剂中芳香分含量越高,其改性沥青各项性能变化幅度越小,抗老化性能越好,反之饱和分含量越高其抗老化性能越差;微观相态结构发生了明显的聚集现象,饱和分含量越多,聚集越严重,颗粒粒径越大,体系由SBS和沥青双连续相变为SBS为分散相、沥青为连续相.
SBS modified asphalt samples were prepared using compatibilizers with different compositions.The changes in performance and microstructure before and after aging were evaluated by conventional performance tests,dynamic shear rheology tests and fluorescence microscopy.The results show that the higher the aromatic content in the compatibilizer,the better the high temperature properties of the modified asphalt,while the higher the saturate content,the better the low temperature performance of the modified asphalt.After aging,the higher the aromatic content in the compatibilizer,the smaller the variability in the various properties of the modified asphalt,and the better the anti-aging properties.Conversely,the higher the saturate content,the worse the anti-aging properties.Meanwhile,the microstructure shows a distinct aggregation phenomenon.The higher the saturate content,the more severe the aggregation and the larger the particle size.The system changes from double continuous phase structure to the SBS phase as the dispersed phase and the asphalt phase as the continuous phase.
作者
王诗雨
董夫强
于新
祖元哲
姜阳
WANG Shiyu;DONG Fuqiang;YU Xin;ZU Yuanzhe;JIANG Yang(College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China;School of Traffic and Transport Engineering,Changsha University of Science and Technology,Changsha 410114,China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2023年第9期996-1002,共7页
Journal of Building Materials
基金
国家自然科学基金资助项目(52278451)。
关键词
改性沥青
相容剂组成
抗老化性能
微观结构
modified asphalt
compatibilizer composition
anti‑aging property
microstructure
