Strategies for incorporating higher recycled asphalt pavement percentages: Review of implementation trials in northeast states

Thomas Bennert, Jo Sias Daniel, Walaa Mogawer

Research output: Chapter in Book/Report/Conference proceedingChapter

18 Scopus citations

Abstract

Because there is a greater emphasis on promoting sustainable materials within transportation infrastructure, state agencies in the VS. Northeast are investigating different strategies that will enable the use of higher percentages of recycled asphalt pavement (RAP) while not sacrificing the performance of the asphalt pavement. In particular, most state agencies in the Northeast arc concerned with the fatigue and thermal cracking performance, as well as the general workability and handling of the higher-RAP-content asphalt mixtures when greater percentages arc used. In conjunction with the Transportation Pooled Fund study TPF 5(230), Evaluation of Plant-Produced High-Percentage RAP Mixtures in the Northeast, three potential strategies were evaluated for incorporating higher RAP contents: using a softer asphalt binder grade to offset the stiff RAP asphalt binder, limiting the amount of RAP binder credited to the total asphalt content of the asphalt mixture, and using a performance-based specification that the high-RAP content mixture must meet for acceptance. The findings of the strategies through plant-produced mixtures, as well us case studies evaluated in detail through laboratory test procedures and analysis, arc summarized. The project trials and results shown will, it is hoped, provide guidance to other agencies looking to increase the percentage of RAP used in their asphalt mixtures.

Original languageEnglish (US)
Title of host publicationTransportation Research Record
PublisherNational Research Council
Pages83-93
Number of pages11
Volume2445
ISBN (Electronic)9780309295338
DOIs
StatePublished - 2014

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Mechanical Engineering

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