Performance evaluation of graphene oxide modified asphalt and
pavement performance of OGFC mixtures
(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2020年1期
- Page:
- 40-48
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Performance evaluation of graphene oxide modified asphalt and
pavement performance of OGFC mixtures
- Author(s):
- LIU Kefei1; ZHU Juncai1; ZHANG Xuefei1; LI Quan2; WU Chaofan2
- 1. Institute of Southern Green Road, Central South University of Forestry and Technology, Changsha 410004,
Hunan, China; 2. Hunan Provincial Engineering Research Center for Construction Solid
Wastes Recycling, Changsha 410205, Hunan, China
- Keywords:
- road engineering; high viscosity modified asphalt; performance evaluation; graphene oxide; porous asphalt pavement; adhesion performance
- PACS:
- -
- DOI:
- -
- Abstract:
- To prepare graphene oxide (GO) high viscosity modified asphalt, GO and styrenebutadienestyrene (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 highviscosity asphalt (GO modified base asphalt, GO/SBS modified asphalt, and Shell high viscosity asphalt) were used to prepare the open graded friction course (OGFC13) 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 lowtemperature crack resistance of asphalt. Furthermore, GO has a better modification effect on base asphalt than modified asphalt, and GO modified asphalt has a good solidstate crosslinking 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 elasticplastic properties of OGFC mixtures, it can improve the aging performance of mixtures in an allround 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 hightemperature stability, construction workability, water stability, lowtemperature crack resistance, and aging resistance. It is a highperformance 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 lowtemperature crack resistance and durability of GO modified asphalt binder (mixture).
Last Update: 2020-01-17