At what temperature range should compaction take place?

Compaction of asphalt is critical for ensuring a durable and stable pavement structure. The correct temperature range for compaction, which is 180 to 300 degrees Fahrenheit, reflects the optimal conditions under which asphalt mixes can be effectively compacted.

At temperatures above 180 degrees Fahrenheit, the asphalt binder is sufficiently fluid, allowing the aggregates to be properly moved and aligned during the compaction process. This ensures that air voids are minimized, enhancing the density and strength of the pavement. If the temperature falls below this range, the mixture may become too viscous, leading to insufficient compaction and increased air voids, which can compromise the longevity and performance of the asphalt surface.

Additionally, the upper limit of 300 degrees Fahrenheit is important to prevent overheating the asphalt mixture, which can lead to a breakdown of the binder and affect the overall quality of the pavement. This range strikes a balance between ensuring the mix is workable and preventing damage to the material.

Understanding this temperature range is crucial for paving professionals to achieve the best results during the compaction process, ensuring that the asphalt paving meets the necessary specifications for strength and longevity.