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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. In the course of time, the asphalt will become brittle and dry with the aggregate starting to wear away and this causes cracks that will let water penetrate into the base of the pavement. There is movement in the pavement’s base material when water slowly seeps into the base through the cracks. The surface of the pavement will then show a grid-like cracking. Replacing the old asphalt or patch repairing it are the two options you can take when your pavement begins to crack. Isolated areas of the pavement are dealt with in patch repair. You remove a potion of the pavement using a backhoe and saw-cutting. A grinding machine can also be used. New asphalt is put to replace the old asphalt that was removed. The amount that is removed is determined by the removal method. You should remove asphalt to a depth of 1.5 times the original thickness of the asphalt. You should replace the base sock so that it matches the adjacent areas to allow for a uniform base support. Your should remove asphalt up to 12 inches past the area that has failed. The maintenance method using asphalt overly is one that is affordable and provides a new wearing surface. Before dealing with asphalt overlay, there are certain factors that you need to be aware of. 2.5 inches should be the maximum thickness of your overlay, and 1.5 inches for its minimum thickness. If you are going to grind down the existing pavement, do not do it on the overlay section to match the existing structure. This can weaken the overlay strength if you do it. The existing pavement will be ground down to where they meet flush together in order to prevent this.
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Inlay and pulverize in place are also areas of asphalt maintenance. You should use a milling machine to do these tasks. A depth of existing asphalt is removed during the inlay process. This depth is many times a previous overlay. The contractors will then put the asphalt back to the pre-inlay elevation. The method of pulverize-in-place will reduce all of the asphalt to particles that are base-rock size.
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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. Seal coating the top layer of the asphalt will help prevent water from seeping in the surface of the pavement and this will help protect the top layer from wear for exposure to the sun and oxidation. This gives the asphalt its even black coating.