Evaluating base widening methods.

Details

• Creators:
  Offei, Edward ; Young, Rhonda ; Ksaibati, Khaled ; Apront, Dick
• Corporate Creators:
  University of Wyoming. Department of Civil and Architectural Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Highways
  • Rehabilitation (Maintenance)
  • Pavement widening
  • Longitudinal joints
  • Recommendations
  • Cone penetrometers
  • Falling weight deflectometers
  • Pavement distress
  • Evaluation and assessment
• Publication/ Report Number:
  FHWA-WY-14/02F
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Wyoming. Department of Transportation
• Abstract:
  The surface transportation system forms the biggest infrastructure investment in the United States of which the ; roadway pavement forms an integral part. Maintaining the roadways can involve rehabilitation in the form of ; widening; which require a longitudinal joint between the existing and new pavement sections to accommodate the ; wider travel lanes, additional travel lanes or modification to shoulder widths. Several methods are utilized for the ; joint construction between the existing and new pavement sections; vertical, tapered and stepped joints. The main ; purpose of this research is to develop a formal recommendation as to the preferred joint construction method that ; provides better pavement support in the State of Wyoming. Field data collection of Dynamic Cone Penetrometer ; (DCP), Falling Weight Deflectometer (FWD), base samples for gradation and moisture content were conducted on 28 ; existing and 4 newly constructed widening projects. Survey of practices and preferences of other states, and ; constructability issues were undertaken. Costs of each joint type were compared as well. ; Results of the analysis indicate that the tapered joint technique showed relatively better pavement strength compared ; to the vertical joint type, and could be the preferred joint construction method. The vertical joint has an 18% increase ; in cost compared to the tapered joint. This research is intended to provide information and/or recommendation to ; state policy makers as to which of the base widening joint techniques (vertical, tapered, stepped) for flexible ; pavement provides better pavement performance.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29332/dot_29332_DS1.pdf
• File Type:
  [PDF - 10.87 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:bc6f7d8adb591a44814c09d8d62221145a1f34f24406a45dd4132274b60060e550cd9b474ddec14dfa0698a6063da9585628c4051242be34e3a3b71913c72607