Asphalt overlay is a method of paving in which a new layer of asphalt is applied to a deteriorating surface. Instead of tearing up an old surface and starting from scratch, asphalt overlay will use the existing layers as a base for the new asphalt pavement.
If the current surface has suffered severe damage like rutting, potholes, large cracks, and expansions, some additional steps may be needed before an overlay is applied.
Possible Additional Steps for an Asphalt Overlay
Not all existing asphalt surfaces are suitable for asphalt overlay. If an asphalt surface has extensive structural damage such as large potholes, root damage, or ruts in the surface, it will need to be ripped up. Asphalt surfaces that are not draining water correctly may also not be suitable for asphalt overlay because the surface may need to be re-graded to handle water more effectively.
Asphalt milling will remove the top layer of an asphalt surface that has taken on cracks, raveling, or other damage. The old layer that has sustained damage must be removed to ensure an even bond when the new asphalt is applied, and to maintain a level surface. An asphalt milling machine will grind down 1″ to 3″ depending on the wear of the asphalt surface. The ground surface material will be hauled to an asphalt recycling plant where it can be integrated into new asphalt mix designs.
The base of an asphalt surface may need to be replaced in areas where potholes, rutting, and sinking have formed. In order to make sure a severe problem will not form again the base will be rebuilt using multiple lifts of aggregate and asphalt.
Once the existing asphalt surface has been prepared, the asphalt overlay can be paved on top of the old surface. The amount of asphalt overlay applied to the surface will vary depending on the thickness of the existing surface, but typically will be within 1.5″ to 2″ thick.
The best way to determine what type of overlay is best for your parking lot is to call the experts at Marino Paving on 908-226-9660 and ask for a no obligation quote. We look forward to hearing from you