High impact pavement is a method of repairing the top surface of a paved area. It is used when damage has occurred because of superficial issues, such as upper layer pothole and crack development, that do not detract from the structural integrity of the paved surface.
The high impact paving method consists of pulverizing or milling the top portion of a paved surface that has become damaged. After the damaged surface is pulverized or milled away, the surface layer is covered up with an additional layer of asphalt so that the damaged area is covered up.
While high impact pavement is an effective method of fixing a parking lot with surface damage, it can only be used when the following five conditions are met:
The base of the paved surface is solid.
High impact paving only offers surface level repairs. It does not help to repair structural problems at the base of a paved surface such as a parking lot. If the base of the lot is unstable, a more extensive means of repairing damage must be used.
There is no alligator cracking present.
"Alligator" or "crocodile" cracking is a frequently seen type of damage to asphalt surfaces. It is indicated by a series of many interconnecting cracks on the uppermost layer of the paved surface.
Alligator cracking is a very distinctive type of cracking that typically indicates sub-base failure. This is a deep problem that can not be repaired by the non-intrusive and superficial method of high impact paving.
Potholes do not extend below the surface's uppermost layer.
High impact paving is ineffective over the long term when it is used to repair potholes that extend beneath the surface level. These types of potholes can compromise the structural integrity of the surface and will not be reached by the pulverizing process that takes place during high impact paving.
Although high impact paving might temporarily remedy deep potholes, they will quickly reappear on the surface after a short period of time.
There is no cracking that runs all the way from one side of the lot to another.
If surface cracks extend all the way from one side of a parking lot to another, structural problems exist beneath the surface that can not be remedied by high impact paving.
The surface is in decent shape overall.
Even if the above conditions are not present, high impact paving might not be sufficient if damage to the surface is extensive. High impact paving is more appropriate for damage to asphalt surfaces that is limited to particular areas rather than being spread extensively over the entire surface.
If you find that your parking lot needs a some repairs or some high impact paving, consider contacting a local specialist, such as Hals Construction.