Evaluation of the effect of bio-oil on the high-temperature performance of rubber modified asphalt

Yong Lei, Hainian Wang, Ellie H. Fini, Zhanping You, Xu Yang, Junfeng Gao, Shi Dong, Guan Jiang

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32 Citations (Scopus)


The reuse of waste tire and biomass is important to environmental protection. The main objective of this study is to investigate the effect of bio-oil on the high-temperature performance of crumb rubber modified asphalt. Two types of crumb rubber powder produced from waste tire, 80-mesh and 20-mesh, were used to prepare the crumb rubber modified asphalt. Four weight ratios of bio-oil to rubber asphalt, 0%, 5%, 10%, and 15%, were chosen to prepare the composite modified asphalt binder in this study. Temperature sweep test and multiple stress creep recovery (MSCR) test were conducted to evaluate the high-temperature of the composite modified asphalt. The results showed that the viscosities of asphalts modified by 20-mesh crumb rubber were greater than that modified by 80-mesh ones. With the addition of bio-oil into crumb rubber asphalt, the viscosities of the composite modified asphalts first increased then decreased. Bio-oil can enhance the high-temperature performance of crumb rubber modified asphalt due to the physical and chemical interactions in a heated asphalt. The short-term aging process may improve the degree of blending between crumb rubber and bio-oil in the heated asphalt dispersion system and enhance the elastic property of crumb rubber modified asphalt.

Original languageEnglish
Pages (from-to)692-701
Number of pages10
JournalConstruction and Building Materials
Publication statusPublished - 10 Dec 2018


  • Bio-oil
  • High-temperature performance
  • MSCR
  • Rubber modified asphalt
  • Temperature sweep

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