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Guide to Asphalt Maintenance When it comes to asphalt maintenance, there are four important aspects to consider. Water penetrating into the asphalt base is the main cause why asphalt begins to fail. 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. There will be a grid-like cracking on the surface when the base materials move and settle. 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. You remove a potion of the pavement using 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. 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. When you are considering where to grind the existing pavement down, do not grind down the overlay section to match the existing structure. If you do this you would weaken the overlay strength. They will grind the existing pavement down to where they meet flush together 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. This is many times a previous overlay. Then asphalt is put 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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Seal coating is an important part of extending the life of asphalt and it should not be overlooked. Mineral fibers, emulsified asphalt, water, and other admixtures are combines to make up the seal coating. This will seal the top layer of the asphalt to prevent water from penetrating the pavement surface and protecting the top layer from wear from sun exposure and oxidation. This is where the asphalt gets its even black coating.

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