Table 1 Reflectance of different pigments and asphalt mixtures [48, 49]
From: Review of regulation techniques of asphalt pavement high temperature for climate change adaptation
Pigment type | Rtotal (%) | Rvisi (%) | Rnir(%) |
|---|---|---|---|
Iron oxide blue | 37.5 | 23.09 | 51.86 |
Iron oxide green | 43.53 | 20.33 | 65.35 |
Iron oxide grey | 24.87 | 25.15 | 25.66 |
Iron oxide red | 34.89 | 13.57 | 54.72 |
Iron oxide yellow | 61.98 | 35.97 | 88.52 |
Fe3O4 (Brown) | 11.25 | 11.40 | 10.99 |
Ni2O3 (Black) | 10.48 | 10.03 | 10.83 |
TiO2 (White) | 86.64 | 83.65 | 94.71 |
Asphalt concrete (control group) | 4.49 | 3.84 | 3.37 |
Asphalt concrete (TiO2 and Fe2O3) | 40.5 | 20.7 | 60.11 |