Abstract
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 language | English (US) |
|---|---|
| Pages (from-to) | 692-701 |
| Number of pages | 10 |
| Journal | Construction and Building Materials |
| Volume | 191 |
| DOIs | |
| State | Published - Dec 10 2018 |
| Externally published | Yes |
Keywords
- Bio-oil
- High-temperature performance
- MSCR
- Rubber modified asphalt
- Temperature sweep
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- General Materials Science