摘要
为分析探究氧化石墨烯/多聚磷酸复合改性剂对基质沥青流变性能的影响机理与效果,通过离析实验分析复合改性沥青贮存稳定性,采用沥青四组分实验测试复合改性沥青的化学组成,并基于高温流变实验与低温流变实验评价复合改性沥青的流变特性。结果表明:复合改性沥青的贮存稳定性可满足规范要求;复合改性剂中多聚磷酸掺量提高时,沥青的沥青质含量增加、轻质组分总量降低,氧化石墨烯对基质沥青化学组分的影响不显著;氧化石墨烯与多聚磷酸改性剂能显著改善沥青高温流变性能;低掺量水平下氧化石墨烯能提高沥青的低温流变性能,而高掺量氧化石墨烯对沥青低温流变性能存在一定负面作用;多聚磷酸掺量对于低温流变性能影响不显著。
In order to analyze and explore the influence mechanism and effect of graphene oxide/polyphosphoric acid composite modifier on the rheological properties of matrix asphalt,the storage stability of composite modified asphalt was analyzed by segregation experiment,the chemical composition of composite modified asphalt was tested by asphalt four-component experiment,and the rheological properties of composite modified asphalt were evaluated based on high temperature rheological experiment and low temperature rheological experiment.The results showed that the storage stability of the composite modified asphalt could meet the requirements of the specification;when the content of polyphosphoric acid in the composite modifier increased,the asphaltene content of the asphalt increased,the total amount of light components decreased,and the effect of graphene oxide on the chemical composition of the matrix asphalt was not significant.Graphene oxide and polyphosphoric acid modifier could significantly improve the high temperature rheological properties of asphalt.Graphene oxide at low content could improve the low temperature rheological properties of asphalt,while high content of graphene oxide had negative effect on the low temperature rheological properties of asphalt.The content of polyphosphoric acid had no significant effect on the rheological properties at low temperature.
作者
王力扬
王彤
王捷
WANG Liyang;WANG Tong;WANG Jie(Jiangsu Dongjiao Intelligent Control Technology Group Co.,Ltd.,Nanjing Jiangsu 210000,China)
出处
《当代化工》
CAS
2024年第9期2061-2066,共6页
Contemporary Chemical Industry
基金
江苏省交通运输科技项目(项目编号:2022Y05)。
关键词
氧化石墨烯
多聚磷酸
化学组分
稳定性
聚合物加工
复合材料
Graphene oxide
Polyphosphoric acid
Chemical composition
Stability
Polymer processing
Composites
