Research Article
Interlayer Working Conditions Classification and Treatment Measures of Airport Asphalt Pavement Overlay
Table 10
Technical specifications of asphalt.
| Technical indicators | Unit | Measured value | Standard [20] |
| Ordinary asphalt | Penetration (25°C, 100 g, 5 s) | 0.1 mm | 43 | 40–120 | Softening point TR&B | °C | 84.0 | ≥80 | Dynamic viscosity (135°C) | Pa·s | 1.64 | ≤3 | Elastic recovery (25°C) | % | 29126 | ≥20000 | RTFOT residue | Quality loss | % | 0.14 | ≤0.6 | Penetration ratio 25°C | % | 71 | ≥65 | Density (15°C) | g/cm3 | 0.986 | – |
| SBS-modified asphalt | Penetration (25°C, 100 g, 5 s) | 0.1 mm | 67.2 | 60–80 | Ductility (5°C, 5 cm/min) | cm | 44.8 | ≥30 | Softening point TR&B | °C | 79.0 | ≥55 | Dynamic viscosity (135°C) | Pa·s | 1.19 | ≤3 | Elastic recovery (25°C) | % | 88 | ≥65 | Density (15°C) | g/cm3 | 1.016 | – | RTFOT residue | Quality loss | % | −0.4 | ≤±1 | Penetration ratio 25°C | % | 65 | ≥60 | Ductility 5°C, 5 cm/min | cm | 31 | ≥20 |
| SBS-modified emulsified asphalt | Weight of screen residue (1.18 mm), ≤ | % | 0.02 | 0.1 | ductility (5°C, 5 cm/min) | cm | 44.8 | ≥30 | Storage stability | 1 d, ≤ | % | 0.5 | 1 | 5 d, ≤ | % | 1.2 | 5 | Evaporated residue | Content, ≤ | % | 52 | 50 | Penetration (25°C, 100 g, 5 s) | 0.1 mm | 59 | 40–120 | Softening point, ≤ | °C | 53.5 | 50 | Ductility (5°C), ≥ | 0.1 mm | 35 | 20 | Solubility (TCE), ≥ | °C | 98.3 | 97.5 | Viscosity | EngLa viscosity E25 | — | 7 | 1–10 | Asphalt standard viscosity C25,3 | S | 15 | 8–25 |
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