Precautions for asphalt concrete pavement construction

1. When the construction temperature of urban expressways and main roads is lower than 10℃, and the construction temperature of other grades of roads is lower than 5℃, it is not suitable to pave rolled hot mix asphalt mixture.

2. Hot mix asphalt mixture pavement construction is not allowed in windy, snowy or rainy weather.

3. On sunny days and low temperatures, the following measures must be taken during construction:

1) Increase the transportation, paving, and rolling temperatures of the mixture. The ordinary transportation temperature should not be lower than 150°C and not exceed 175°C; the low-temperature paving construction temperature should be 130°C ~ 140°C; the rolling temperature should be 135°C ~ 150°C and not lower than 110°C, and the final rolling temperature should not be Below 70℃～80℃.

The transportation temperature of modified asphalt mixture shall not be lower than 170℃ and shall not exceed 185℃; the low-temperature construction temperature for paving is 140℃~160℃, and the low-temperature construction temperature for rolling is 135℃~150℃;

2) Material transport trucks must be covered and insulated;

3) Use high-density paver, and the screed should be heated;

4) Strengthen temperature measurement at the construction site, Keep temperature measurement records;

5) Shorten the paving time, press the paving as it goes, and handle the construction joints