Forensic Study of Early Failures with Unbonded Concrete Overlays

A forensic investigation was conducted to identify failure mechanisms responsible for early failures of unbonded concrete overlays on selected projects in Ohio, including I-70 in Madison County, I-77 in Washington and Noble Counties, and I-90 in Lake County, plus a project in US Route 30 in Ashland County that was one of the better performing jointed plain concrete (JPC) overlays in Ohio. Standard NCHRP procedures (Report 747) were generally followed. Field inspections included visual assessment; distress survey; falling weight deflectometer; MITScan; and collection of core specimens. Laboratory testing included core dimensions, material mechanical properties, and petrographic analysis. HIPERPAV analysis was conducted to evaluate the concrete strength development in early stage. A finite element analysis was conducted to evaluate structural failure mechanisms. Recommendations were made for ODOT to improve performance and prevent similar failures in the future.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 252p

Subject/Index Terms

Filing Info

  • Accession Number: 01663399
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/OH-2017-38
  • Contract Numbers: SJN 134996
  • Created Date: Mar 21 2018 10:12AM