What should be done immediately after a runway is cold milled?

Immediately after a runway is cold milled, sweeping it is crucial to remove any debris, loose material, or dust that can negatively impact the next steps of the resurfacing process. Sweeping ensures that the surface is clean and properly prepared for subsequent operations, such as applying a sealer or laying down new pavement. A clean surface is essential for achieving good adhesion of any materials that will be applied afterward, which ultimately contributes to the longevity and performance of the runway.

In addition, if debris is left on the surface, it can become trapped in the new material applied later, leading to potential issues like weak spots or surface imperfections. Therefore, the process of sweeping aligns with best practices in highway maintenance and construction, prioritizing safety and effectiveness in preparing the runway for future use.