| 摘要: |
| 为了研究氧化石墨烯（GO）对沥青黏附性能的影响，在基质沥青和SBS改性沥青中添加0.5%GO粉末和GO分散液来制备GO改性沥青并对其进行接触角试验.基于表面自由能理论，计算GO改性沥青的黏附功、黏聚功和剥落功等参数来评价其黏附性能，同时通过浸水马歇尔和冻融劈裂试验对GO改性沥青混合料的水稳定性进行验证.结果表明：GO提高了沥青和集料体系的表面能，增加了表面能中色散成分的比例；GO分散液比GO粉末在沥青中的分散程度更好；GO分散液对基质沥青和SBS改性沥青的黏聚功、黏附功及剥落功有明显的提升；SBS-2#GO改性沥青混合料的残留稳定度和冻融劈裂强度比最大，表明GO增强了沥青混合料的抗水损害性能. |
| 关键词: 表面自由能 氧化石墨烯改性沥青 抗水损害性能 黏附特性 |
| DOI：10.3969/j.issn.1007-9629.2021.06.029 |
| 分类号:U414 |
| 基金项目:中国科学院科技服务网络计划区域重点项目（KFJ-STS-QYZD-149）；国家自然科学基金资助项目（51668038，51868042）；甘肃省杰出青年基金项目（1606RJDA318）；甘肃省高等学校产业支撑引导项目（2020C-13） |
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| Adhesion Characteristics of Graphene Oxide Modified Asphalt Based on Surface Free Energy |
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ZHAO Yan1, LI Bo1,2, CAO Gui1,2, YANG Juan3, LI Zhiwei1
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1.National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control， Lanzhou Jiaotong University， Lanzhou 730070， China;2.Research and Development Center of Transport Industry of Technologies， Materials and Equipment of Highway Construction and Maintenance， Gansu Province Highway Traffic Construction Group Co.， Ltd.， Lanzhou 730030， China;3.Laboratory of Clean Energy Chemistry and Materials， Lanzhou Institute of Chemical Physics， Chinese Academy of Sciences， Lanzhou 730000， China
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| Abstract: |
| To investigate the effect of graphene oxide （GO） on adhesion characteristics of modified asphalt， 0.5% GO powder and GO dispersion were added to base asphalt and SBS modified asphalt， and contact angel test was performed on GO modified asphalt. Based on the surface free energy theory， cohesion work and spalling work were calculated to evaluate the adhesion performance of graphene oxide modified asphalt. The water stability of the mixture was verified by immersion Marshall and freeze-thaw splitting tests. The results show that GO can improve the surface energy of asphalt and aggregate system， and increases the proportion of dispersive components in surface energy. The dispersion effect of GO dispersion is better than that of GO powder. GO could significantly improve the cohesion work， adhesion work and peeling work of both base asphalt and SBS modified asphalt. GO dispersion has the best effect on improving the residual stability and freeze-thaw splitting strength ratio of SBS modified asphalt， which further confirms the strengthening effect of GO on the water damage resistance of the mixture. |
| Key words: surface free energy graphene oxide modified asphalt water damage resistance adhesive property |
