The repair of failed flexible pavements - which make up the majority of most systems - is often an expensive process, especially if the pavement has base or subgrade problems, and a simple overlay will not result in a long-term solution. A procedure is available, called full-depth reclamation (FDR) with cement, which allows old deteriorated asphalt pavements to be recycled and stabilized with cement, creating a new base that will provide an excellent foundation for long-term pavement performance. Recent studies have shown that agencies have successfully used the FDR with cement process for well over 25 years, with little or no evidence of structural failure in these FDR sections. Additionally, agencies that use this process have reported cost savings between 30% and 60% over conventional reconstruction methods. Cost savings and environmental benefits result from use of existing pavement materials, reduced hauling associated with removing old materials and placing new materials, and from the longer expected life of a pavement with a cement-stabilized base. This paper will include the engineering and construction steps involved in designing and building an FDR project, with examples of successful projects constructed over the last 25 years in a variety of challenging environments. For the covering abstract of this conference see ITRD number E216597.
Samenvatting