The Effect of Rejuvenators on RAP Mixtures: A Study Based on Multiple Scale Laboratory Test Results

H. F. Haghshenas, H. Nabizadeh, Y. R. Kim

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


Utilizing the reclaimed asphalt pavement (RAP) materials for production of asphalt mixtures are environmentally friendly and economical. One necessary step towards arriving at an efficient use of these materials is the understanding of undesired inherent characteristics of RAP such as aged (stiff) asphalt binder and inconsistent aggregate properties. Previous studies on the rejuvenating agents have reported a fairly high improvement in the engineering properties of asphalt mixtures with the high contents of RAP. The paper presents the effects of various rejuvenators on the engineering characteristics of the asphalt mixtures containing high percentage RAP (65%) with two different scales of mixture: asphalt concrete (AC) and fine aggregate matrix (FAM). Resulting experimental tests of viscoelastic stiffness and cracking behavior of asphaltic materials in both AC and FAM scales were compared.

Original languageEnglish (US)
Pages (from-to)697-707
Number of pages11
JournalGeotechnical Special Publication
Issue number270 GSP
StatePublished - 2016
Event2nd Geo-Chicago Conference: Geotechnics for Sustainable Energy, Geo-Chicago 2016 - Chicago, United States
Duration: Aug 14 2016Aug 18 2016


  • Hot mix asphalt
  • Multi-scale laboratory tests
  • Reclaimed asphalt pavement
  • Rejuvenator

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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