Table 2 Assessment standard of extreme low temperature climate in cold regions
From: Analysis methodology and assessment indices of vulnerability for asphalt pavement in cold regions
Assessment Index | Micro | Mild | Moderate | Severe | Extreme |
|---|---|---|---|---|---|
Extremely lowest temperature (°C) | <− 25 | − 25 ~ − 30 | −30 ~ − 35 | −35 ~ − 40 | ≥ − 40 |
Low temperature duration (d) | < 5 | 5 ~ 10 | 10 ~ 20 | 20 ~ 30 | ≥30 |
Daily temperature difference (°C) | < 12 | 12 ~ 16 | 16 ~ 20 | 20 ~ 24 | ≥24 |