Causes of Asphalt Surface Deterioration:
The most common causes of asphalt deterioration are water accumulation in areas of lower elevation, excessive loads on the asphalt, and the destructive effects of vehicle oil and gasoline. Over time, water accumulation can cause asphalt to crack and split severely, or "alligator" as it is commonly referred to in the paving industry. Bearing excessive weight can cause the asphalt to sink, and oil and gasoline that seep into the asphalt cause further deterioration.
When areas of pavement deteriorate and need to be repaired, Options Asphalt corrects the problem by using one of two methods:
1) Skin Patching is recommended when the underlying base is structurally sound and is typically used on depressed surfaces. This process is accomplished by cleaning the existing pavement, applying a tack coat (asphalt-based glue), and applying hot-mixed asphalt. The new asphalt is then mechanically compacted. Because the skin patches are placed on top of existing pavement, the finished surface may be slightly higher. The edges are blended in, or "feathered," as much as possible.
2) Removal and Replacement, or R&R is used for more severe deterioration, especially when the underlying base has been affected. The damaged areas are squared off, saw cut, and excavated to a depth from two inches to two feet depending on the subsurface conditions. New aggregate is then added, if required, and compacted in preparation for the new asphalt surface. Finally, hot-mixed asphalt is placed over this layer and compacted. Any raveled surfaces (surfaces in which the aggregate is coming loose) are then smoothed out and re-striping can be done, if needed.
Benefits of Asphalt Patching:
Both Skin Patching and Removal and Replacement are economical components of an overall pavement maintenance program. One benefit of timely asphalt patching is the prevention of more expensive repairs in the future. Also, creating a safer environment results in fewer accidents and, ultimately, reduced ownership liability. Contact Options Sealcoating today to learn more about asphalt patching or any of the other paving, sealing, and new construction services offered by our team of trained professionals.