Structural performance of ultra-thin whitetopping on Illinois roadways and parking lots.

Details

• Creators:
  King, Daniel ; Roesler, Jeffery
• Corporate Creators:
  Illinois Center for Transportation
• Corporate Contributors:
  United States. Federal Highway Administration ; Illinois. Dept. of Transportation
• Subject/TRT Terms:
  Concrete Overlays Condition Surveys Deflection Falling Weight Deflectometers Parking Lots Pavement Distress Roads Structural Tests Thinness Whitetopping
• Publication/ Report Number:
  FHWA-ICT-14-018 ; ICT-14-020 ; UILU-ENG-2014-2022
• Resource Type:
  Tech Report
• Geographical Coverage:
  Illinois
• Corporate Publisher:
  Illinois Center for Transportation
• Abstract:
  A performance evaluation of ultra-thin whitetopping (UTW) pavements in Illinois was undertaken in 2012–2014
  
  to evaluate current design procedures and to determine design life criteria for future projects. The two main
  
  components of this evaluation were (1) visual distress surveys of 20 existing UTW projects across the state to
  
  document and quantify distresses and (2) falling weight deflectometer (FWD) testing of eight of these UTW
  
  projects to evaluate structural performance.
  
  The findings of the surveys are detailed in this report. Deflection data collected during FWD testing were used to
  
  directly calculate load transfer efficiency and assess joint performance, but there was no existing method to
  
  assess the in situ structural properties of UTW pavements. To better characterize structural performance, a
  
  backcalculation procedure for UTW pavements was derived and applied to the deflection data obtained from
  
  FWD testing. The backcalculated effective concrete thickness quantifies the load carrying capacity of the UTW
  
  pavement, variation of the structural capacity as a function of distance along the roadway, and potentially the
  
  condition of the concrete–asphalt bond interface and the underlying asphalt concrete layer.
  
  The findings of the visual distress surveys and the FWD data analysis largely agreed with each other and were
  
  studied to help provide a greater understanding of factors that affect UTW performance. From this analysis, a
  
  number of conclusions and recommendations were made regarding UTW pavement design and construction.
  
  
• Format:
  PDF
• Funding:
  R27-061
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:89980b5b08ec1b3b35e9d4dd2638bc1f1683449f353b94fb602310fc8dc8d1ed
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27875/dot_27875_DS1.pdf
• File Type:
  [PDF - 3.27 MB ]