Reclaimed asphalt pavement limits to meet surface frictional requirements

Karol Kowalski , Rebecca McDaniel , Jan Olek


Reclaimed asphalt pavement (RAP) is widely used to construct new asphalt pavement layers, but its use is often limited in surface courses because of concerns about frictional performance, especially in areas where polish-resistant aggregates are scarce or not available. The goal of the research reported in this paper was to determine the maximum amount of RAP that can be blended with high-friction aggregates and used in surface mixes without significantly impacting frictional properties. The properties of RAP from six different sources were evaluated to determine typical RAP characteristics and used to fabricate a mixture simulating a worst-case scenario RAP with a low-friction aggregate. That RAP mixture was used to evaluate the frictional characteristics of two types of hot-mix asphalts with various amounts and types of high-friction aggregates. Specimens were subjected to laboratory polishing to simulate the effects of traffic. Results suggest that the threshold level of RAP in surface mixes that will not have detrimental effect on their frictional properties was about 30%, even when the RAP contained a highly polishable aggregate. (C) 2015 American Society of Civil Engineers.
Author Karol Kowalski IDM
Karol Kowalski,,
- The Institute of Roads and Bridges
, Rebecca McDaniel
Rebecca McDaniel,,
, Jan Olek
Jan Olek,,
Journal seriesJournal of Materials in Civil Engineering, ISSN 0899-1561
Issue year2016
Publication size in sheets0.5
Keywords in EnglishReclaimed asphalt pavement (RAP); Friction; Stone matrix asphalt (SMA); Dense graded asphalt (DGA); Asphalt pavement; Laboratory mix evaluatio
Languageen angielski
Score (nominal)30
ScoreMinisterial score = 30.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.644 (2) - 2016=2.003 (5)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.