Analysis on the road performance of graphene composite rubber asphalt and its mixture. (December 2022)

• Record Type: Journal Article
• Authors: Guo, Rui; Tang, Jianhua; Gu, Jianfeng; Guo, Guangling; Feng, Xuming
• Is Part Of: Case studies in construction materials. Volume 17(2022)
• Publication Date: 2022-12
• Subjects: Asphalt mixture -- Graphene composite rubber asphalt -- Physical and mechanical indices -- Road performance evaluation; Building materials -- Case studies -- Periodicals; 691.05
• DOI: 10.1016/j.cscm.2022.e01664
• Languages: English
• ISSNs: 2214-5095

Abstract

Abstract: In this paper, it analyzed the road performance of graphene composite rubber asphalt binder and its mixture by comparing with that of AH-70 # and SBS modified asphalt, based on rheological test and routine test, in combination with a highway example in the Dunhuang area, in China. The results that it compared with AH-70 # and SBS asphalt, the graphene composite rubber modified asphalt's penetration decreased by 28% and 20.6%, the ductility decreased by 32.5% and 22.9%, and softening point increased by 47.9% and 12.3%, the rutting factor increased by 186.75% and 9.95%, the stiffness modulus decreased by 27.62% and 7.74%, and the creep rate increased by 9.68% and 3.01%. The optimum asphalt content of the SMA mixture with graphene composite rubber modified asphalt was 0.2～0.5% higher than that of AH-70 # and SBS asphalt mixtures. Under the same test conditions, the graphene composite rubber modified asphalt mixture's Marshall stability increased by 49.4% and 14.8% compared with AH-70 # matrix and SBS asphalt mixtures. The graphene composite rubber modified asphalt mixture had better flexural strength and dynamic stability than AH-70 # and SBS asphalt mixtures, and the asphalt mixture's the failure strain and dynamic stability were increased by 9.87%, 4.9% and 78.1%, 30.5% respectively, which can provide a reference for in-depth understanding of the performance of graphene composite rubber modified asphalt mixture and its application in engineering.