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Guide to Asphalt Maintenance Maintaining an asphalt pavement involves four important areas. Asphalt begins to fail when water penetrates into the asphalt base. When asphalt has been there for a long time it tends to get brittle and dry and will soon begin to crack, and these cracks makes way for water to penetrate and reach the base of the pavement. The base material will then move and settle when water seeps into the cracks. This results in a grid-like cracking on the surface. Replacing the old asphalt or patch repairing it are the two options you can take when your pavement begins to crack. When doing patch repair, you only consider isolated areas of the pavement. The pavement is removed used a backhoe and saw-cutting. You can also use a grinding machine for this purpose. When the old asphalt is removed, it is then replaced with new asphalt. The removal method determines the amount that is removed. The depth of removal should be one and a half times the original thickness of the asphalt. In order to have a uniform base support, you should replace the base rock so that it matches the adjacent area. Your should remove asphalt up to 12 inches past the area that has failed. Asphalt overlay maintenance is affordable and provides a new wearing surface. There are certain factors that one needs to be aware of when dealing with asphalt overlay. The overlay should have a maximum thickness of 2.5 inches and a minimum of 1.5 inches. If you are going to grind down the existing pavement, do not do it on the overlay section to match the existing structure. The overlay strength could be weakened if you do this. To prevent this they need to grind the existing pavement down to where they meet flush together.
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Inlaying and pulverizing in place is another aspect of asphalt maintenance. This is accomplished using a milling machine. During the inlay process, a depth of the existing asphalt is removed. You should do it at a depth which is deeper than a previous overlay. Contractors will then put back asphalt back to the pre-inlay elevation. When the method of pulverize in place is used, the asphalt will be pulverized to as small as base rock sized particles.
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If you want to extend the life of asphalt, then seal coating is important and should not be neglected. The contents of seal coating is a mixture of mineral fibers, emulsified asphalt, and water together with other admixtures. In order to prevent water from penetrating the pavement surface, it is important to seal coat the top layer of the asphalt and this will protect the top layer from wear from sun exposure and oxidation. This gives the asphalt its even black coating.