Abstract
In order to evaluate the effects of common modifiers on viscoelastic properties of asphalt, 90# asphalt and six kinds of modified asphalts made from base asphalt were tested by dynamic shear rheometer. The effects of modifiers were analyzed from different aspects, including accumulation of deformation, elastic stored energy, viscous dissipative energy, viscoelastic ratio and complex modulus. Then three kinds of tests including strain sweep, temperature sweep and time sweep were implemented on 90# asphalt and two kinds of modified asphalts. The results show that it is practicable and effective to use energy method to evaluate viscoelastic properties of asphalt; aromatic oil can increase residual strain and dissipative energy dramatically; combination of rubber powder (or SBS) and aromatic oil can increase elastic stored energy greatly; both rubber powder and SBS can increase viscoelastic ratio dramatically, followed by SBR; composite modified asphalt has an excellent performance on road engineering.
| Original language | English |
|---|---|
| Pages (from-to) | 7-15 |
| Number of pages | 9 |
| Journal | Zhongguo Gonglu Xuebao/China Journal of Highway and Transport |
| Volume | 26 |
| Issue number | 4 |
| State | Published - Jul 2013 |
| Externally published | Yes |
Keywords
- Experimental research
- Hysteresis loop
- Modified asphalt
- Road engineering
- Viscoelastic property
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