Abstract: A major California Department of Transportation road project will be going out to bid soon that will challenge the asphalt industry in terms of materials, techniques, and longevity. The road is a stretch of Interstate 710 in Los Angeles County. At stake is the question of whether the asphalt road construction industry can produce a long-life asphalt pavement product that will last 30-40 years of useful life. A new performance specification will require a three-layered approach to the roadbed. For 500 ft on either side of bridges, the existing pavement will be removed and a full-depth section of asphalt pavement will be constructed. The rest of the demonstration project will use an asphalt pavement section over the existing deteriorated portland cement concrete roadway that will be cracked and seated. A new asphalt section will be placed on top. The asphalt section will consist of a 1-in. leveling course, with a geotextile fabric placed on the top. Then an additional 4 in. of asphalt will be placed over the geotextile fabric, followed by a 3-in. modified asphalt pavement surface course, and finally a 1-in. thick, open-graded friction course for the wearing surface.
Publication Year: 2000
Publication Date: 2000-07-01
Language: en
Type: article
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