摘要
为了研究氧化石墨烯(GO)改性沥青结(混)合料的老化性能与机理,基于室内试验模拟沥青结(混)合料热氧老化过程,通过黏度试验、三大指标试验、浸水马歇尔试验、冻融劈裂试验和低温弯曲试验测试并分析基质及GO改性沥青结(混)料的老化性能。研究结果表明:GO的加入可减缓热氧老化对沥青三大指标的影响,即GO可提高沥青结合料的抗老化性能,GO的加入可显著提高沥青混合料的水稳定性,但对低温抗裂性有微弱不利影响。添加GO不仅在一定程度上改善了老化后沥青混合料的水稳定性,还减缓了老化对其低温抗裂性能的影响,说明GO改性沥青混合料具有良好的抗老化性能。
In order to study the aging performance and mechanism of graphene oxide(GO)modified asphalt binder and mixture,the aging tests of asphalt binder and mixture are artificially simulated.The viscosity test,traditional indicators test,Immersion Marshall test,freeze-thaw splitting test and lowtemperature bending test are carried out on the asphalt binders and mixtures.The results show that adding GO can slow down the influence of aging on the traditional indicators,indicating that GO can improve the anti-aging performance of asphalt.In addition,adding GO can significantly improve the water stability of the asphalt mixture,but has a minor negative effect on the low temperature crack resistance.Finally,adding GO can not only improve the water stability of aged asphalt mixture,but also slow down the effect of aging on its low-temperature crack resistance,indicating that GO modified asphalt has superior antiaging performance.
作者
刘克非
朱俊材
吴超凡
李泉
LIU Ke-fei;ZHU Jun-cai;WU Chao-fan;LI Quan(School of Civil Engineering,Central South University of Forestry and Technology,Changsha 410004,China;Hunan Provincial Engineering Research Center for Construction Solid Wastes Recycling,Changsha 410205,China)
出处
《公路》
北大核心
2020年第2期225-230,共6页
Highway
基金
湖南省重点领域研发计划项目,项目编号2019GK2244
中国博士后科学基金资助项目,项目编号2019M633003
湖南省教育厅科学研究项目,项目编号18A176
工程流变学湖南省重点实验室开放课题,项目编号19HNKLE05
长沙市科技计划项目,项目编号kq1801081
长沙市雨花区科技计划项目,项目编号YHKJ-2018-ZG-20
长沙县科技计划项目,项目编号2019-1969.
关键词
道路工程
氧化石墨烯
沥青混合料
老化性能
road engineering
graphene oxide
asphalt mixture
aging performance
