Research Article
Effects of Test Conditions on APA Rutting and Prediction Modeling for Asphalt Mixtures
Table 2
Technical properties of SBS modified asphalt.
| | Test index | Unit | Test result | Technical requirement |
| | Penetration (100 g, 5 s, 25°C) | 0.1 mm | 65.67 | 60~80 | | Penetration index | — | 0.1 | ≥−0.4 | | Softening point | °C | 83.1 | ≥55 | | Ductility (5 cm/min, 5°C) | cm | 33.8 | ≥30 | | Flash point | °C | 272 | ≥230 | | Solubility | % | 99.7 | ≥99 | | Elastic recovery (25°C) | % | 99.67 | ≥65 | | Segregation of storage stability, difference of softening point after 48 h | °C | 1.6 | ≤2.5 | | Density (15°C) | g/cm3 | 1.034 | — | | Relative density (15°C) | — | 1.037 | — | | Density (25°C) | g/cm3 | 1.030 | — | | Relative density (25°C) | — | 1.033 | — | | Quality loss after RTFOT | % | −0.2 | ±1.0 | | Residual penetration after RTFOT (100 g, 5 s, 25°C) | 0.1 mm | 48.7 | — | | Penetration ratio after RTFOT (25°C) | % | 74.16 | ≥60 | | Residual ductility after RTFOT (5 cm/min, 5°C) | cm | 21.46 | ≥20 |
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