摘要
针对传统石墨烯存在成本高、与基质沥青相容性和分散性差的问题,采用聚乙烯吡咯烷酮(PVP)对石墨烯进行处理,基于针入度分级体系、PG分级体系与黏度分级体系指标,评价研究PVP修饰石墨烯(PVP-G)复合SBS改性沥青的常规针入度指标性能、流变特性、黏度特性,优化了适宜的PVP-G掺配比例。在此基础上,采用3大路用性能试验、浸水APA试验、SCB弯拉疲劳试验与室内MMLS1/3试验,探讨了PVP-G/SBS复合改性沥青混合料的路用性能、疲劳性能与长期稳定性能。结果表明,添加PVP-G改善了SBS改性沥青高温、低温和抗老化特性,增强了沥青胶结料的弹性恢复性能与抗变形性能,改善了低温抗断裂性能与应力释放性能。1.5%PVP-G/4%SBS复合改性沥青混合料有优异的高温抗永久变形性能、抗疲劳性能和抗水损害性能。在高温长期荷载及高温浸水综合作用下,1.5%PVP-G/4%SBS复合改性沥青混合料比5%SBS改性沥青混合料表现出了更优异的抗永久变形能力与耐久性。
In view of the high cost and poor compatibility with matrix asphalt and poor dispersion of traditional graphene, the graphene is treated with polyvinylpyrrolidone(PVP), and the conventional penetration index performance, rheological characteristics and viscosity characteristics of PVP modified graphene(PVP-G) composite SBS modified asphalt mixture are evaluated based on the penetration grading system, PG grading system and viscosity grading system index, the appropriate mixing ratio of PVP-G is optimized. On this basis, three road performance tests, water immersion APA test, SCB bending and tensile fatigue test and indoor MMLS1/3 test are carried out to discuss the road performance, fatigue performance and long-term stability of PVP-G/SBS composite modified asphalt mixture. The results show that adding PVP-G can improve the high temperature, low temperature and anti-aging properties of SBS modified asphalt, enhance the elastic recovery performance and deformation resistance performance of the asphalt binder, and improve the low-temperature fracture resistance and stress release performance. The 1.5%PVP-G/4.0%SBS composite modified asphalt mixture has excellent high temperature resistance to permanent deformation, fatigue resistance and water damage resistance. Under the combined effects of high temperature long-term load and high temperature water immersion, 1.5%PVP-G/4.0%SBS composite modified asphalt mixture exhibits better resistance to permanent deformation and durability than 5%SBS modified asphalt mixture.
作者
望远福
范杰林
赵方华
张亮洪
Wang Yuan-fu;Fan Jie-lin;Zhao Fang-hua;Zhang Liang-hong(Transportation Comprehensive Administrative Law Enforcement Bureau of Xinjiang Uygur Autonomous Region,Urumqi 830000,China;Enforcement Detachment of Project Quality Supervision and Law Enforcement of Transportation Comprehensive Administrative Law Enforcement Bureau of Xinjiang Uygur Autonomous Region,Urumqi 830000,China;Tiezheng Testing Technology Co.Ltd.,Jinan 250200,China;School of Highway,Chang'an University,Xi'an 710064,China)
出处
《公路》
北大核心
2022年第1期19-26,共8页
Highway
基金
山东省交通运输厅项目,项目编号2018-122-011
2019年山东省第二批技术创新项目,项目编号20192071008。
