Abstract

During the summer and fall of 2002, the Federal Highway Administration (FHWA) in partnership with 16 State Highway Agencies (SHA) and over 30 Industry groups constructed 12 full-scale test sections of pavements with various modified asphalt binders at FHWA’s Pavement Test Facility in McLean, Virginia. The 12 test
sections were loaded using FHWA’s two Accelerated Loading Facility (ALF) machines to evaluate permanent deformation (rutting) and fatigue cracking response. The ALF performance results are linked to a comprehensive laboratory binder rheological, physiochemical, and mixture characterization study. Two of the
test sections use crumb rubber material (CRM) technology: Lane 1 employs the Arizona wet process and Lane 5 employs a Texas terminal blend process. This paper explores the ability of laboratory characterization techniques to predict the performance of CRM technology under accelerated loading and compares the performance the two CRM technologies to each other and other modified systems.

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