What is the acceptable range for compaction temperature?

The acceptable range for compaction temperature is critical in ensuring the quality and longevity of asphalt pavement. The optimal compaction temperature allows for the mixture to be sufficiently workable, which aids in achieving the desired density as the asphalt cools. A temperature that is too low can lead to inadequate compaction, resulting in reduced strength and durability of the pavement. Similarly, if the temperature is too high, it may lead to segregation or damage to the materials.

Choosing a range of plus or minus 9 degrees is recommended because it provides a suitable balance that allows for proper workability while minimizing risks associated with extreme temperatures. Adhering to this range helps maintain the integrity of the asphalt binder and aggregates during placement, ultimately contributing to better performance of the pavement.