Research Article
Antiaging Property and Mechanism of Phase-Change Asphalt with PEG as an Additive
Table 4
Roughness of modified asphalt (nm).
| Types of asphalt | Aging state | Rq (nm) |
| Base asphalt | Unaged | 32.9 | RTFOT aged | 24.2 | PAV aged | 19.4 |
| PEG-modified asphalt | Unaged | 14.9 | RTFOT aged | 14.0 | PAV aged | 12.5 |
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