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the new replacement base is a blend of recycled asphalt mixed with base material, cement and water. Partial reconstruction involves the removal and repair of failed sections of concrete streets. In this program, 100% of the concrete removed from these failed sections is taken to a concrete recycling plant. Through these three programs the City of Dallas estimates it is recycling an aver- age of 80% of its existing street materials, thereby reducing road repair debris in landfills–a major goal of the City. The City of Dallas Department of Street Services, which spearheads the Sustainable Rehabilitation, Restoration and Partial Reconstruction of Dallas Streets project, is a winner of the 2008 PCA Sustainable Leadership Awards. These awards honor public officials who utilize cement or cement-based prod- ucts to achieve sustainable benefits. “I was impressed by the variety of ways in which the Department of Street Services street rehabilitation and restoration plan helps Dallas in meeting its goal of becoming a ‘greener’ city,” said Richwine. “This is certainly a major milestone in proving that being sustainable is not only obtainable, it makes good economic sense, too.” Road Recycling is the Sustainable and Economical Choice for Fort Worth o create a longer service life and eliminate continuous pothole-filling, cities and counties across the country are adopting programs to recycle their streets and roads with cement. In Fort Worth, Texas, full reconstruction of failed asphalt roads currently costs the city about $380,000 per lane mile and requires replacing curbs, gutters, sidewalks and driveway approaches; by comparison, completely rebuilding a street using full-depth reclamation (FDR) with cement costs in the range of $250,000 per lane mile. However, with FDR with cement, the city is often able to keep existing curbs, gutters and sidewalks, cutting the cost even further. Since 1996, Fort Worth's street maintenance program has saved taxpayers millions of dollars by recycling the city's deteriorating and failed asphalt streets with cement. The city has rebuilt 619 lane-miles – or 4.72 million square yards – of roadway using FDR with cement, according to Najib Fares, infrastructure manager for the City's Transportation & Public Works Department. In addition to making good economic sense, recycling rutted and failing roadways with FDR is also better for the environ- T Crews incorporate cement into the pulverized roadway during the recycling process. ment. FDR with cement often replaces the traditional but burdensome and costly method of full reconstruction, which requires completely ripping out the old, worn out roadway and replacing it. Since FDR allows old roadway materials to be reused, the need for new raw materials is greatly reduced and previously-used materials are no longer sent to already-overburdened landfills. The FDR process also reduces the need for bringing new materials to the construction site and hauling old materials out, thus reducing fuel consumption and cutting down on vehicle emissions. “This new cement stabilized base, a product of in-place recycling, provides a strong, durable foundation for the chosen pavement surface,” said Matthew Singel, program manager of the Cement Council of Texas. “In addition to the reduced Special advertising supplement to the McGraw-Hill Construction Regional Publications 9

Full-Depth Reclamation

Table of Contents for the Digital Edition of Full-Depth Reclamation

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