What does air void percentage influence in asphalt paving?

The air void percentage in asphalt paving is crucial for the longevity of the pavement. A proper balance of air voids is necessary to ensure that the asphalt mixture achieves sufficient density and durability. When the percentage of air voids is appropriate, it allows for proper encapsulation of aggregates, which contributes to the overall strength and durability of the pavement.

If the air void percentage is too high, it can lead to weakened pavement structure and increased susceptibility to moisture infiltration, which can cause damage over time. On the other hand, if the air voids are too low, it may lead to issues such as increased stiffness and reduced flexibility, resulting in cracking. Therefore, controlling air void percentage directly influences how long the pavement will withstand traffic loads, weather conditions, and other environmental factors.

Mix temperature pertains to the processes during asphalt production and application but does not directly connect with the air voids. Pay calculation is linked to project costs and contract stipulations, which are affected by performance metrics but are not directly determined by air void content alone. The color of asphalt is primarily influenced by the materials used in the mix and not by the air void percentage.