ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 12 August 2010
Page Count: 6

Laboratory Investigation of Fatigue Characteristics of Rubberized Asphalt Mixtures Containing Warm Asphalt Additives at a Low Temperature

Xiao, Feipeng
P.E., Research Assistant Professor, Clemson Univ., Clemson, SC

Zhao, Wenbin
Graduate Research Assistant, Clemson Univ., Clemson, SC

Amirkhanian, Serji N.
Professor, Clemson Univ., Clemson, SC

(Received 6 November 2009; accepted 19 July 2010)

Abstract

The fatigue life of an asphalt pavement is directly related to various factors of a typical warm mix asphalt (WMA) mixture. Improving the understanding of the fatigue behavior of the rubberized WMA mixtures is helpful in recycling the scrap tires and saving energy. This study explores the utilization of the conventional fatigue analysis approach in investigating the cumulative dissipated energy, stiffness, and fatigue life of rubberized asphalt concrete mixtures containing WMA additives. The fatigue beams were made with one rubber type (−40 mesh ambient crumb rubber), two aggregate sources, two WMA additives (Asphamin and Sasobit), and tested at 5°C. The test results indicated that the addition of crumb rubber and WMA additive not only reduced the mixing and compaction temperatures of rubberized asphalt mixtures offset by crumb rubber but also slightly extended the long-term performance of pavement when compared with conventional asphalt mixtures.

Keywords:
rubberized asphalt concrete, warm asphalt additive, mixing and compaction temperature, stiffness, dissipated energy, fatigue life

Paper ID: JTE102844
DOI: 10.1520/JTE102844
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