Effects of Rejuvenating Agents on Superpave Mixtures Containing Reclaimed Asphalt Pavement

Rejuvenator is not a commonly used softening agent to be used in recycling of reclaimed asphalt pavement (RAP). In this study, Superpave mixtures containing RAP were designed using rejuvenating agents, including a rejuvenator and a softer binder, and subsequently evaluated in terms of the volumetric...

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Bibliographic Details
Published inJournal of materials in civil engineering Vol. 19; no. 5; pp. 376 - 384
Main Authors Shen, Junan, Amirkhanian, Serji, Aune Miller, Jennifer
Format Journal Article
LanguageEnglish
Published Reston, VA American Society of Civil Engineers 01.05.2007
Subjects
Applied sciences
Bitumen. Tars. Bituminous binders and bituminous concretes
Buildings. Public works
Exact sciences and technology
Materials
Recovery materials
Road construction. Pavements. Maintenance
Surfacing
TECHNICAL PAPERS
Transportation infrastructure
United States
North America
South Carolina
America
Shear
Asphalt pavements
Rejuvenation
Asphalt mixes
Experimental study
Pavement rut
Tensile strength
Flexible pavement
Asphalt
Formulation
Shear deformation
Aging
Properties of materials
Flexible pavements
Recycled material
Recycling
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Summary:Rejuvenator is not a commonly used softening agent to be used in recycling of reclaimed asphalt pavement (RAP). In this study, Superpave mixtures containing RAP were designed using rejuvenating agents, including a rejuvenator and a softer binder, and subsequently evaluated in terms of the volumetric results, obtained the indirect tensile strength (ITS) of samples as well as evaluating the mixtures for rutting using the asphalt pavement analyzer (APA). The content of the rejuvenator used for those mixtures containing the rejuvenator was determined from the blending charts of RAP binders containing the rejuvenator. A total of 12 Superpave mixtures including 10 containing RAP and two virgin were designed. The results indicated, for the mixtures tested for this project, that: (1) properties of the recycled mixtures using the rejuvenator, such as ITS and APA, were better than those containing the softer binder; (2) 10% more RAP could be incorporated in the Superpave mixtures by using the rejuvenator than using the softer binder; and (3) the blending charts established under the Superpave binder specifications can be used to determine the content of the rejuvenator for the recycling.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0899-1561
1943-5533
DOI:10.1061/(ASCE)0899-1561(2007)19:5(376)