Asphalt Repairs become necessary for a multitude of reasons. The first step in any asphalt repair project is identifying the cause of the asphalt damage. Sometimes this is obvious, such as when tree roots have broken through the surface, or when corrosive chemicals such as hydraulic fluid have eaten away at the asphalt. Other times poor drainage has left pools of standing water which damage the asphalt over time.
When performing asphalt repairs, first a larger area around the pothole or depression is saw-cut and removed. If the exposed base rock underneath the asphalt needs to be addressed, now is the time to base up this areas to create an even surface for the patch. Next, a coat of tack, or asphalt emulsion, is applied to the surface to ensure asphalt adhesion. Hot mix asphalt is then installed and compacted to the correct thickness. Finally, a roller is used to create a smooth transition from the new patch to the surrounding asphalt.
A new layer of asphalt can quickly and effectively return your parking lot or roadway to its original look. Adding thickness to your existing asphalt surfaces increases the structural integrity and adds a smooth and even finish. New asphalt can be paved directly on top of existing asphalt surfaces, and this is called an overlay. In addition, asphalt can be paved on top of a sufficient layer of compacted DOT-approved base rock. Areas that are currently grass, concrete, or paver bricks can be excavated first prior to new base rock being installed.
The first step for any asphalt paving project is creating an ideal surface for the new asphalt. This may involve basing-up any low-lying areas or existing potholes with base rock, removing and setting aside any car stops, or cleaning the area of any detritus or debris. In addition, any transition areas may need to be milled down, and the current drainage structures may need to be adjusted to allow for the elevation change of the new layer of asphalt. Once the area has been suitably prepped, a layer of tack, or asphalt emulsion, is applied to the surface to ensure asphalt adhesion. Then, hot mix asphalt is applied in an even layer by a paving machine before being compacted with a vibratory steel-drum roller. Finally, a rubber tire roller traverses the new asphalt to provide a level finish.
Asphalt milling is the process by which a specified depth of an existing asphalt surface is removed. Asphalt milling is a valuable service when the current asphalt surface is not suitable for an asphalt overlay, but the base layer is still intact. In addition, asphalt milling is sometimes performed to preserve the elevations of a parking lot or roadway prior to paving on the existing surface.
Asphalt milling is performed by attaching a milling head to a skid steer or for larger areas, using an actual milling machine. As the machine travels across the surface of the asphalt, steel teeth grind up a precise thickness of asphalt leaving a level, scarified surface in its wake. The asphalt millings are swept up and hauled off-site to be reused or recycled, and what remains is a uniform surface that is perfect for asphalt paving.
The asphalt can also be milled completely down to the rock base, which enables our crew to shore up any low-lying depressions, and/or recompact the base prior to re-paving which will help eliminate alligator cracking.
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