Comprehensive Evaluation of the Long-Term Performance of Rubberized Pavement: Phase I: Laboratory Study of Rubberized Asphalt Mix Performance

Crumb rubber, made from scrap tires, has been introduced into the production of different types of hot mix asphalt (HMA) in either a wet or dry process. In the wet process, the crumb rubber and binder are completely mixed to form asphalt rubber (AR), which is then mixed with aggregates in a drum. In the dry process, the crumb rubber is mixed directly with aggregates in the drum to produce an HMA called rubberized asphalt mix. This paper examines the long-term performance of porous European mix (PEM) and stone matrix asphalt (SMA) pavements to which crumb rubber was added in the dry process. Test sections were visually inspected for surface distress, following the guidelines in the Georgia Department of Transportation (GDOT) Pavement Condition Evaluation System (PACES) manual. Core samples were evaluated in the laboratory on selected physical and durability properties, including the void ratio, permeability, density, Cantabro loss, and Marshall stability. Visual inspection results show that the performance of rubberized pavement almost equals that of polymer-modified PEM with no rutting, raveling, or cracking, while the Cantabro test showed a higher mass loss after 3 years’ service. After 5 years’ service, the rubberized pavement performed slightly better to rutting depth, while other visual indicators remained the same. The rubberized SMA pavement had slightly higher Marshall stability and lower flow than the control SMA pavement, with similar effects on the polymer-modified PEM’s surface performance.

• Record URL:
  http://g92018.eos-intl.net/eLibSQL14_G92018_Documents/11-19.pdf
• 
• Corporate Authors:

  Georgia Southern University

  Statesboro, GA  United States 

  Georgia Department of Transportation

  Office of Materials and Research, 15 Kennedy Drive
  Forest Park, GA  United States  30297-2534

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Shen, Junan
  • Xie, Zhaoxing
• Publication Date: 2012-12

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Maps; Photos; References; Tables;
• Pagination: 70p

Subject/Index Terms

• TRT Terms: Crumb rubber; Durability; Evaluation; Hot mix asphalt; Laboratory studies; Pavement distress; Pavement performance; Polymer asphalt; Rutting; Stone matrix asphalt
• Geographic Terms: Georgia
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 01560935
• Record Type: Publication
• Report/Paper Numbers: FHWA-GA-12-1119, 11-19
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: Apr 24 2015 10:24AM