Pavement evaluation using a portable lightweight deflectometer.

Details

• Creators:
  Commuri, Sesh ; Zaman, Musharraf ; Beainy, Fares ; Singh, Dharamveer ; Nazari, Moeen ; Imran, Syed ; Barman, Manik
• Corporate Creators:
  University of Oklahoma
• Corporate Contributors:
  United States. Dept. of Transportation. Research and Innovative Technology Administration
• Subject/TRT Terms:
  • Portable equipment
  • Deflectometers
  • Pavement performance
  • Field tests
  • Pavement layers
  • Stiffness
  • Asphalt pavements
  • Dynamic modulus of elasticity
  • Performance tests
• Publication/ Report Number:
  OTCREOS11.1-14-F
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oklahoma
• Corporate Publisher:
  Oklahoma Transportation Center
• Abstract:
  The use of Zorn ZFG-3000 portable Lightweight Deflectometer (LWD) in the in-situ ; assessment of pavement quality was investigated in this research. A lower load and a ; shorter load pulse duration are used in a LWD as compared to a Falling Weight ; Deflectometer (FWD). LWDs are ideally suited for the structural evaluation of a single ; pavement layer at a time. LWDs could serve as a cost effective, non-destructive, in-situ test ; method for the evaluation of the mechanistic properties of the pavement and help to bridge ; the gap between the design and the construction of the pavements. ; The performance of the Zorn ZFG3000 LWD device in measuring the stiffness of asphalt ; layer was studied during construction of full-depth asphalt pavements. While it was observed ; that the Zorn ZFG-3000 LWD was easy to use and able to determine the general trends in ; increasing/decreasing stiffness of the asphalt pavement layer, the researchers found very ; little correlation between the LWD measured modulus and the density of the asphalt mat at ; the test locations as determined from roadway cores. Further, very little correlation was ; observed between the LWD measured modulus and the dynamic modulus of the pavement ; at the test locations. The LWD measurements also did not appear to depend on any ; pavement parameters such as mix type and gradation, lift thickness, total asphalt pavement ; thickness, and type of construction. Based on these findings, it is concluded that the Zorn ; ZFC-3000 LWD is not suitable for measuring the stiffness of asphalt pavements and for use ; in Quality Assurance of pavements.
  More +
• Format:
  PDF
• Funding:
  DTRT06-G-0016
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27075/dot_27075_DS1.pdf
• File Type:
  [PDF - 1.47 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:6a77543ef9118b1d78a6b37c34f5b353be19642bf9cfcbbab623d9057367f4d7