Comprehensive evaluation of the long-term performance of rubberized pavement, phase I : laboratory study of rubberized asphalt mix performance.

Details

• Creators:
  Shen, Junan ; Xie, Zhaoxing
• Corporate Creators:
  Georgia Southern University
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Asphalt rubber
  • Crumb rubber
  • Hot mix asphalt
  • Porous pavements
  • Stone matrix asphalt
  • Pavement performance
  • Laboratory tests
  • Durability
  • Rutting
• Publication/ Report Number:
  FHWA-GA-12-1119
• Resource Type:
  Tech Report
• Geographical Coverage:
  Georgia
• Corporate Publisher:
  Georgia. Department of Transportation. Office of Research
• Abstract:
  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.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28706/dot_28706_DS1.pdf
• File Type:
  [PDF - 2.07 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0b93ab9a7336546b2162e241c8630df0d81a5be8f237b3afcf9bd5dd2406816f7481ebfbff8505d80664a32a977a2046c234d4adcbad70a2280237c35126f059