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Important Aspects of 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. So when water seeps into the cracks, it causes the base material to move and settle. This results in a grid-like cracking on the surface. When the pavement begins to crack then there are only two options to take, and these are either to replace the old asphalt or patch repair it. Isolated areas of the pavement are dealt with in patch repair. The pavement is removed used a backhoe and saw-cutting. You can also use a grinding machine for this purpose. Replacing the old asphalt that was removed by new asphalt is the next step. Whatever method of removal you use will determine the amount that is removed. The depth of removal should be one and a half 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. Asphalt overlay maintenance is affordable and provides a new wearing surface. If you are going to do an asphalt overlay you should consider certain important factors. 2.5 inches should be the maximum thickness of your overlay, and 1.5 inches for its minimum thickness. Grinding down the pavement should not be done on the overlay section so that he existing structure will be matched. If you do this you would weaken the overlay strength. 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. You remove existing asphalt when you do the inlay process. 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. Pulverize in place method reduces all of the asphalt to 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 is where the asphalt gets its even black coating.