氧化石墨烯复配SBS改性沥青物理流变性能研究  

Study on Physical and Rheological Properties of Graphene Oxide Compounded SBS Modified Asphalt

作　　者：周焕云[1] 张磊[1] ZHOU Huan-yun;ZHANG Lei(School of Transportation,Southeast University,Nanjing Jiangsu 210096,China)

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《公路交通科技》2021年第1期10-18,共9页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(6550140013)。

摘　　要：近年来,随着纳米科技和材料科学的飞速发展,新兴的碳族纳米材料氧化石墨烯(GO)由于具备卓越的机械性能,已经被广泛应用于各种有机高分子和无机胶凝材料中以制备复合材料来增强基体,其无可比拟的结构特性和尺寸效应引起了道路研究人员的极大兴趣。氧化石墨烯在道路工程领域尤其是沥青路面中越发得到重视,然而目前大部分的研究只是局限于氧化石墨烯单一改性基质沥青,且改性效果并不显著。通过高速剪切的方式配制了氧化石墨烯复配SBS改性沥青(GO/SBS)。借助动态剪切流变仪(DSR)、多重应力蠕变恢复(MSCR)、弯曲梁流变仪(BBR)等技术手段研究了氧化石墨烯复配SBS改性沥青的动态流变行为。使用针入度、延度、软化点等基本指标对复配改性沥青的物理技术性能进行了评估。试验结果表明:氧化石墨烯的引入可以明显提升SBS改性沥青的高温稳定性和动态力学响应;适量的氧化石墨烯可以改善SBS改性沥青的低温开裂抗性,其中氧化石墨烯用量为0.6%时,氧化石墨烯复配SBS改性沥青的延度、软化点分别提高了26%和8.3%,针入度却略微有所降低;氧化石墨烯复配SBS改性沥青的高温抗车辙性能、低温抗开裂性能均较SBS单一改性沥青有所提升,这表明氧化石墨烯复配SBS改性沥青具有一定的应用前景。In recent years,with the rapid development of nanotechnology and material science,the emerging carbon family nanomaterial graphene oxide(GO)has been widely used in various organic polymers and inorganic cementitious materials to prepare composite materials for strengthening the matrix due to its excellent mechanical properties.Its incomparable structural characteristics and size effect have aroused great interest of road researchers.GO has been paid more and more attention in the field of road engineering,especially in asphalt pavements.However,most of the current researches are limited to GO single modified base asphalt,and the modification effect is not significant.The GO compound SBS modified asphalt is prepared through high-speed shearing.With the help of dynamic shear rheometer(DSR),multiple stress creep recovery(MSCR),bending beam rheometer(BBR)and other technologies,the dynamic rheological behavior of GO compound SBS modified asphalt is studied.The physical and technical performance of the compound modified asphalt is evaluated by using basic indicators such as penetration,ductility and softening point.The experimental result shows that(1)the introduction of GO can significantly improve the high temperature stability and the dynamic mechanical response of SBS modified asphalt;(2)the appropriate amount of GO can improve the low temperature cracking resistance of SBS modified asphalt,the ductility and the softening point of GO composite SBS modified asphalt are increased by 26%and 8.3%respectively when the amount of GO is 0.6%,but the penetration is slightly reduced;(3)GO compound SBS(GO/SBS)modified asphalt has better high-temperature rutting resistance and low-temperature anti-cracking performance than SBS single modified asphalt,which shows that GO compound SBS modified asphalt has certain application prospect.

关 键 词：道路工程 流变性能 试验研究 DSR MSCR BBR SBS改性沥青 

分 类 号：U414.1[交通运输工程—道路与铁道工程]