摘要
为制备氧化石墨烯(GO)高黏改性沥青,采用GO和SBS粒子为复配改性剂对70~#基质沥青进行复合改性。通过沥青结合料常规性能、流变性能和黏附性能测试对GO改性沥青性能进行表征;采用3种高黏沥青(GO改性基质沥青、GO/SBS改性沥青和壳牌高黏沥青)制备开级配磨耗层(OGFC-13)混合料并评价其路用性能,考察GO改性沥青应用于OGFC混合料的适用性。结果表明:GO可显著提升沥青的黏度、稠度、刚度、韧性、抗永久变形能力、热储存稳定性和黏附性能,而对沥青低温抗裂性能影响并不显著,GO对基质沥青的改性效果优于改性沥青;GO改性沥青具有较好的固态交联网络,在高温(60℃)下可抑制胶体结构的破坏并提高沥青的弹性恢复功能;GO的加入可提高沥青的色散分量和极性分量,并提高沥青的表面自由能,进而提升沥青的黏附性能;GO可有效减缓沥青老化过程中轻质组分的挥发,从而降低老化对OGFC混合料劲度和弹塑性能的影响,在全面提高混合料老化性能的同时延长路面使用寿命;与壳牌高黏沥青结(混)合料相比,GO/SBS改性沥青结(混)合料具有优良的高温稳定性、施工和易性、水稳定性、低温抗裂性和抗老化性能,是一种具有高性能的高黏改性沥青结(混)合料。未来可尝试采用加入芳烃油、木质素纤维等方法进一步改善GO改性沥青结(混)合料的低温抗裂性和耐久性。
To prepare graphene oxide(GO)high viscosity modified asphalt,GO and styrene-butadiene-styrene(SBS)particles were used as composite modifiers to modify 70~#base asphalt.The properties of the GO modified asphalt were characterized by testing the conventional performance,rheological performance,and adhesion performance of asphalt binder.Three kinds of high-viscosity asphalt(GO modified base asphalt,GO/SBS modified asphalt,and Shell high viscosity asphalt)were used to prepare the open graded friction course(OGFC-13)mixture and evaluate its pavement performance,and the applicability of GO modified asphalt in the OGFC mixture was investigated.The results show that the GO can significantly improve the viscosity,consistency,stiffness,toughness,permanent deformation resistance,thermal storage stability,and adhesion of asphalt,but has no significant effect on the low-temperature crack resistance of asphalt.Furthermore,GO has a better modification effect on base asphalt than modified asphalt,and GO modified asphalt has a good solid-state cross-linking network,which can inhibit the damage of a colloidal structure and improve the elastic recovery function of asphalt at a high temperature(60℃).The addition of GO can improve the dispersion and polarity components of asphalt as well as its surface free energy,thereby improving its adhesion property.GO can effectively slow down the volatilization of light components in the asphalt aging process,thus reducing the impact of aging on the stiffness and elastic-plastic properties of OGFC mixtures,it can improve the aging performance of mixtures in an all-round way and prolong the service life of pavement.Compared with the Shell high viscosity asphalt binder(mixture),the GO/SBS modified asphalt binder(mixture)has excellent high-temperature stability,construction workability,water stability,low-temperature crack resistance,and aging resistance.It is a high-performance and high viscosity modified asphalt binder(mixture)with overall excellent performance.In the future,the addition of aromatic oil and lignin fiber can be used to further improve the low-temperature crack resistance and durability of GO modified asphalt binder(mixture).5 tabs,5 figs,37 refs.
作者
刘克非
朱俊材
张雪飞
李泉
吴超凡
LIU Ke-fei;ZHU Jun-cai;ZHANG Xue-fei;LI Quan;WU Chao-fan(Institute of Southern Green Road,Central South University of Forestry and Technology,Changsha 410004,Hunan,China;Hunan Provincial Engineering Research Center for Construction Solid Wastes Recycling,Changsha 410205,Hunan,China)
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第1期40-48,共9页
Journal of Chang’an University(Natural Science Edition)
基金
中国博士后科学基金项目(2018M633003)
湖南省重点领域研发计划项目(2019GK2244)
湖南省教育厅科学研究项目(18A176)
工程流变学湖南省重点实验室开放基金项目(19HNKLE05)
长沙市科技计划项目(kq1801081)
长沙市雨花区科技计划项目(YHKJ-2018-ZG-20)
长沙县科技计划项目(2019-1969).
关键词
道路工程
高黏改性沥青
性能评价
氧化石墨烯
透水沥青路面
黏附性能
road engineering
high viscosity modified asphalt
performance evaluation
graphene oxide
porous asphalt pavement
adhesion performance
