Research Article
Using the Rheological Index to Quantitatively Evaluate the Mechanical Performance of High-Elasticity Modified Asphalt
Table 1
Performance of different modified asphalt binders with various modifier dosages.
| Test item | Unit | HEA1 | HEA2 | HEA3 | HEA4 | HEA5 |
| Penetration (25°C, 100 g, 5 s) | 0.1 mm | 61 | 59 | 58 | 55 | 60 | Penetration index | — | 0.10 | 0.22 | 0.42 | 0.77 | 0.53 | Ductility (5°C, 5 cm/min) | cm | 54 | 53 | 58 | 43 | 45 | Softening point (ring and ball method) | °C | >90 | >90 | >90 | >90 | >90 | Flash point (opening) | °C | >260 | >260 | >260 | >260 | >260 | Storage stability (softening point difference) (165°C, 48 hr) | °C | 1.5 | 1.5 | 2.0 | 4.5 | 3.0 | Elastic recovery (25°C, 10 cm) | % | 94 | 95 | 99 | 96 | 98 | Dynamic viscosity (60°C) | Pa·s | 169403 | 430521 | 761774 | 440524 | 450535 | Kinematic viscosity (135°C) | Pa·s | 2.3 | 2.5 | 3.1 | 3.8 | 4.0 | Residue of RTFOT (163°C, 75 min) | Elastic recovery (25°C, 10 cm) | % | 80 | 85 | 88 | 87 | 86 | Penetration ratio (25°C) | % | 95 | 95 | 98 | 98 | 95 | Ductility (5°C, 5 cm/min) | cm | 28 | 30 | 35 | 35 | 30 |
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