What defines the function of a fog seal in pavement maintenance?

The function of a fog seal in pavement maintenance primarily revolves around sealing and rejuvenating existing asphalt surfaces. A fog seal involves applying a thin layer of a diluted asphalt emulsion over aged and oxidized asphalt. This process helps to restore flexibility and longevity to the pavement by penetrating the surface and sealing any small cracks or voids that may have developed over time.

Additionally, the rejuvenating properties of the fog seal help to replenish the lost oils in the asphalt binder, which is important for maintaining the overall integrity and performance of the pavement. This rejuvenation prevents further deterioration and can extend the life of the pavement significantly, making it a cost-effective maintenance practice.

While reducing surface dust is a minor benefit of applying a fog seal, this is not its primary function. Similarly, while creating emulsions is relevant to the composition of fog seals, it does not accurately define their purpose in pavement maintenance. The focus remains on the sealing and rejuvenation of existing surfaces, which is essential for effective pavement management.