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A significant part of the asphalt contracting business comes from work awarded through public bids. Many times, this is a school project, government project or perhaps a state funded roadway project. The bids are typically sealed, and the lowest bidder is awarded the project. When a city government project is awarded, in some cases, the project is managed by the public works department personnel.
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In 1979, WIRTGEN built their first cold milling machine designed to provide the asphalt paving industry an innovative rehabilitation technique. Based on technology from the mining industry, these machines use dozens of carbide-tipped bits on a fast rotating drum to remove a specified thickness from the surface of an asphalt pavement. With the invention of the milling machine, asphalt contractors can now remove and replace a portion of the asphalt pavement, which has several key benefits.
A mill and overlay is a critical part to any pavements lifecycle and comes with several benefits. Using a milling machine, 1.5 or more inches of the existing pavement surface is removed, and then the milled surface is overlaid with new asphalt pavement. A mill and overlay refreshes the pavement’s surface, but how do you know when it is time for a mill and overlay?
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