Performance Evaluation of Asphalt Mixtures with High Recycled Asphalt Pavement Content

Abstract

This study extensively evaluated the resistance to moisture damage and thermal cracking of hot-mix asphalt (HMA) mixtures with high recycled asphalt pavement (RAP) content (up to 50%) from field sections on provincial Highway 8 between Gimli and Hnausa in Manitoba, Canada. A comparison between the properties and performance of the field-produced and laboratory-produced mixtures was also conducted and was included in this study. HMA mixtures with 50% RAP resulted in acceptable resistance to moisture damage and thermal cracking. The use of multiple freeze–thaw cycles provided a better characterization of the mixtures' resistance to moisture damage. Acceptable correlations were observed between the estimated critical temperatures from the blending chart and the measured ones from the recovered asphalt binders. Overall, laboratory-produced mixtures could be used to evaluate the relative resistance of the field-produced mixtures to moisture damage and thermal cracking.

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References

Hassan

Feasibility of Using High RAP Contents in Hot Mix Asphalt. Swinburne University of Technology, Hawthorne, Victoria, Australia, 2009.

FHWA. Asphalt Pavement Recycling with Reclaimed Asphalt Pavement (RAP). U.S. Department of Transportation. http://www.fhwa.dot.gov/pavement/recycling/rap/index.cfm. Accessed July 1, 2010.

McDaniel

, and Anderson

R. M.

NCHRP Report 452: Recommended Use of Reclaimed Asphalt Pavement in the Superpave Mix Design Method: Technician's Manual. TRB, National Research Council, Washington, D.C., 2004.

ARA, Inc., ERES Consultants Division. Guide for Mechanistic–Empirical Design of New and Rehabilitated Structures. Final report NCHRP Project 1–37A. Transportation Research Board of the National Academies, Washington, D.C., 2004. www.trb.org/mepdg/guide.htm.