The excess aggregate should not be broomed off the roadway as soon as the rolling is finished. The asphalt is still too soft and must be allowed to stiffen or cure before brooming. Otherwise, the broom will strip the aggregate away from the binder. If necessary,

light

brooming may be performed before opening to traffic to remove excess aggregate that is not embedded in the asphalt.

Final

brooming should be done as soon as the binder is fully cured: on the same day or the following morning. Best results are obtained by waiting until the following morning (as early as possible). Temperatures are lower during the early hours and the aggregate will be held more firmly in place with only the excess aggregate removed.