Increasing RAP without Lowering Standards: Three Paving Strategies Being Explored in the Northeast

Reclaimed asphalt pavement (RAP) entails the same materials used to build the original highway system being re-used to repair, reconstruct, and maintain them. According to the Federal Highway Administration (FHWA) recycled materials policy, where appropriate the recycling of aggregates and other highway construction materials makes sound economic, environmental, and engineering sense. This article reviews three paving strategies being explored in the Northeast to increase the use of RAP without lowering standards. The strategies are: selection of softer virgin binder grade; reduction in allowable RAP binder contribution; and the use of performance-based specifications. A softer asphalt binder helps to compensate for the stiffer RAP binder. Increasing the effective asphalt content of the asphalt mixture will help to increase the durability and fatigue resistance of the asphalt mix.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Photos; References; Tables;
  • Pagination: pp 25-33
  • Serial:
    • Asphalt
    • Volume: 29
    • Issue Number: 1
    • Publisher: Asphalt Institute
    • ISSN: 0004-4954

Subject/Index Terms

Filing Info

  • Accession Number: 01547305
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 4 2014 11:33AM