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Full-Depth Reclamation with Cement D eteriorating roads are a constant problem for cities and counties. Today engineers and public works officials are turning to a process called full-depth reclamation (FDR) with cement to economically and sustainably repair and replace damaged roads. FDR with cement rebuilds worn out asphalt pavements by recycling the existing roadway. There is no need to haul in aggregate or haul out old material for disposal. Truck traffic is reduced, and there is little or no waste. The recycled base is stronger, more uniform, and more moisture resistant than the original base, resulting in a long, low-maintenance life. And most important to the tight budget of a department of transportation, recycling costs are normally at least 30 to 60 percent less than the removal and replacement of the old pavement. Saves money: FDR uses the materials from the deteriorated asphalt pavement, and, with the addition of cement, creates a new stabilized base. The old asphalt and base materials are pulverized, mixed with cement and water, and compacted to produce a strong, durable base for either an asphalt or concrete surface. Using recycled products can reduce the cost of the road repair by up to 60 percent, allowing for the completion of more miles. Material conservation: Conserving virgin construction materials through recycling with cement makes smart economic and strategic sense. A century of modern growth and urbanization in America has depleted once plentiful aggregate supplies. Frequently, aggregates come either from distant quarries at great expense or from local sources offering only marginal quality. Continuing to exhaust these valuable resources to rebuild existing roads only propagates and accelerates the problem. Recycle, rebuild: Recycling with cement makes the reconstruction of old roads a largely self-sustaining process. The original “investment” in virgin road materials becomes a one-time cost, which is renewed periodically, through cement stabilization and addition of a new, thin surface course. Additionally, if old asphalt and base materials are not recycled, they must be disposed of or stockpiled, increasing transportation costs and utilizing valuable landfill space. In some locales, old asphalt can no longer be landfilled and must be transported to other communities, increasing costs and related traffic emissions. Old asphalt, new foundation: Stabilizing the old asphalt surface, granular base, and underlying subgrade soil with cement creates a strong foundation for the pavement. Usually, there is little need for material to be removed or added. The old, brittle asphalt, when pulverized, becomes a “black gravel” that will bond to hydrated cement readily. Simple and fast: The basic procedure is simple. The complete recycling process can be finished in one day, and local traffic can return almost immediately. 4 Special advertising supplement to the McGraw-Hill Construction Regional Publications

Full-Depth Reclamation

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

Full-Depth Reclamation - 1
Full-Depth Reclamation - 2
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Full-Depth Reclamation - 4
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