Table 7 The comparison of the road performance between the polyurethane- and asphalt-based bridge deck pavement materials
Technical index | Type of mixture | Test result | Technical requirements | Test method |
|---|---|---|---|---|
Dynamic stability (70oC, 0.7 MPa) / (passes/mm) | Polyurethane mixture [53] | 69750 | ≥6000 | T 0719 in JTG E20-2011, China |
Dynamic stability (60oC, 0.7 MPa) / (passes/mm) | Base asphalt mixture [96] | 1691 | ≥1000 | |
SBS modified asphalt mixture [96] | 6503 | ≥2800 | ||
Residual splitting strength after freeze-thawing / % | Polyurethane mixture [53] | 80 | – | T 0729 in JTG E20-2011, China |
Base asphalt mixture [96] | 77.6 | ≥70 | ||
SBS modified asphalt mixture [96] | 90.0 | ≥75 | ||
Fatigue life (15oC, 1200 με) / 104 | Polyurethane mixture [53] | 168 | – | T 0739 in JTG E20-2011, China |
Fatigue life (15oC, 0.6 stress ratio) / 104 | Asphalt mixture [97] | 2.07 | – | |
Fatigue life (20oC, 1000 με) / 104 | Asphalt mixture [98] | 0.2856 | – | |
Low-temperature flexural tensile strain (–10oC) /με | Polyurethane mixture [53] | 48762 | – | T 0728 in JTG E20-2011, China |
Asphalt mixture [99] | 2322 | ≥2000 | ||
Water permeability coefficient / (ml·min-1) | Polyurethane mixture [53] | No seepage | ≤200 | T 0730 in JTG E20-2011, China |
Asphalt mixture [100] | No seepage | ≤200 |