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 Durability Hot Mix Asphalt Laboratory Tests Pavement Performance Porous Pavements Rutting Stone Matrix Asphalt
• 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0b93ab9a7336546b2162e241c8630df0d81a5be8f237b3afcf9bd5dd2406816f7481ebfbff8505d80664a32a977a2046c234d4adcbad70a2280237c35126f059
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28706/dot_28706_DS1.pdf
• File Type:
  [PDF - 2.07 MB ]