What causes asphalt pavement to fail?
- Assuming that the initial asphalt was designed and constructed properly, the primary cause of failure is the penetration of water into the asphalt base.
- This process begins with the oxidation of the pavement surface which causes the asphalt to dry and become brittle, it then leads to erosion of the top layer of fine particles and the appearance of larger stones and small cracks on the surface.
- If left untreated these cracks grow over time and eventually allow water to penetrate to the base of the pavement.
- When water enters the base of the pavement the base material moves and settles leading to further cracking and an alligator appearance.
- When the pavement reaches this stage the best option is removal and replacement of the old asphalt.
Selection and application of the right solution
All it takes is one phone call to Asphalt Management Inc and we can advise on your unique situation and the most economical solution for your pavement repair. There are a number of techniques which have been specifically designed to repair certain parking lot situations. Asphalt Management Inc. offers a solution to your pavement problems with a variety of asphalt repair options.
Full Depth Removal and Replace Asphalt Repair
This is the traditional, time tested way of repairing asphalt when sub-base failure is the problem. This method requires saw cutting the failed area, removing old asphalt and hauling it away from the site. The saw cut area is then replaced with new asphalt. This method is done so that the contractor can check the sub-base beneath the asphalt to determine what made that area of asphalt fail. Full depth removal and replace is more time to consume and expensive because it requires additional labor, equipment, and material.
Infrared Pavement Restoration Repair
This technology allows Asphalt Management Inc. to recycle the existing asphalt through the use of Infrared Rays. With this type of repair, the asphalt is heated from the inside out allowing us to heat the asphalt to plant temperature around 325 degrees without burning the asphalt. When the patch is completed you have a repair that is level with original grade. This process takes only 20 minutes from start to finish and is thermally bonded to existing pavement making this a quality, sufficient and cost-effective way to repair your asphalt.
Mill and Replace Asphalt Repair
The mill and replace method is similar to the full depth remove and replace method. However, not all the existing asphalt has to be removed, which stretches your maintenance dollars. The section is generally milled to a depth of 2″, the old material is then removed and disposed of. An SSI-H tack coat is applied to the asphalt for adhesion between the layers. New asphalt is then installed to bring the failed area back up to existing grade level. The new asphalt is then rolled to ensure compaction.
Overlay Asphalt Repair
This method is different from the previous repairs offered because the patch is installed above the existing asphalt grade. Weaker areas must be prepared in advance to provide a uniform foundation for the overlay. Carefully engineered and properly compacted patches will produce a uniform supporting layer for the overlay. Once the pavement has been prepared an SSI-H tack coat is applied to the asphalt for adhesion between the layers. Generally, this type of repair is considered the least expensive and it is also just a temporary fix to the problem.