Research Article
Research on Rheological Properties by Desulfurized Rubber Powder/SBS Composite-Modified Asphalt and Road Performance of Its Mixture
Table 2
The performance technical indicators of three kinds of modified asphalt.
| | Items | Desulfurized rubber asphalt | Rubber asphalt | SBS-modified asphalt | | Value | Value | Requirements | Value | Requirements |
| | Penetration (25°C, 0.1 mm) | 65 | 53 | 40∼80 | 63 | 60∼80 | | Ductility (5°C, cm) | 12.6 | 8.5 | ≥8 | 32 | ≥30 | | Softening point (°C) | 62 | 68 | ≥58 | 79 | ≥55 | | Density (15°C, g/cm3) | — | 1.047 | Measured | 1.030 | Measured | | Viscosity (135°C, Pa·s) | 2.527 | 8.674 | — | 1.828 | ≤3.0 | | Viscosity (180°C, Pa·s) | 0.790 | 2.142 | 1.5∼4.0 | — | — | | Aged asphalt (TFOT) | Loss on heating (%) | −0.16 | −0.182 | ≤±1.0 | −0.229 | ≤±1.0 | | Penetration ratio (%) | 90 | 89 | ≥60 | 81 | ≥60 | | Ductility (5°C, cm) | 10.1 | 5.2 | ≥5 | 27.4 | ≥20 |
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