Nano-ZnO/BF复合改性沥青高温性能研究

Study on High Temperature Performance of Nano-ZnO/BF Composite Modified Asphalt

为提高道路服务质量,延长沥青路面的使用年限,采用纳米氧化锌(Nano-ZnO)和玄武岩纤维(BF)作为复合外掺剂对基质沥青进行改性,以提升其高温性能。对基质沥青、Nano-ZnO改性沥青以及Nano-ZnO/BF复合改性沥青进行常规性能试验和动态剪切流变试验,分析改性剂对沥青高温性能的影响。结果表明:加入纳米氧化锌和玄武岩纤维后,三大性能指标均出现不同程度的改善,且Nano-ZnO/BF复合改性沥青的车辙因子明显高于Nano-ZnO改性沥青,即玄武岩纤维能有效改善沥青的高温性能。

In order to improve the quality of road service and prolong the service life of asphalt pavement,nano-zinc oxide(Nano-ZnO)and basalt fiber(BF)were used as composite admixtures to modify the matrix asphalt to improve its high temperature performance.The conventional performance test and dynamic shear rheological test of matrix asphalt,Nano-ZnO modified asphalt and Nano-ZnO/BF composite modified asphalt were carried out to analyze the influence of modifier on the high temperature performance of asphalt.The test results show that the three performance indexes are improved to varying degrees after adding Nano-ZnO and BF,and the rutting factor of Nano-ZnO/BF composite modified asphalt is significantly higher than that of Nano-ZnO modified asphalt,that is,BF can effectively improve the high temperature performance of asphalt.