Evaluation of Maintenance Procedures for Bridge Spalling on Parapet Walls

Deterioration of parapet walls is a concern to the Ohio Department of Transportation. Spalling of the parapets presents a danger as pieces of deteriorated concrete may fall onto the road below. The current repair method is to chip off the deteriorated concrete, however, this process may damage the sound concrete and leaves an unprotected surface. This project used a literature search to explore methods of concrete removal and protecting/sealing the remaining surface. It was determined that hydrodemolition was the most promising method of concrete removal as it does not damage the remaining concrete. This is most efficiently done with a robot and a robot was found that may work on vertical surfaces of the parapets. Literature and research on protectants/sealants shows a number of possible solutions, but there is no long term data on performance. One protectant, polyurea, appears promising. This material may not only seal the concrete but may provide a reinforcing barrier that might retain loose pieces of concrete.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Photos; References;
  • Pagination: 40p

Subject/Index Terms

Filing Info

  • Accession Number: 01634915
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/OH-2017-15
  • Contract Numbers: SJN 135313
  • Files: NTL, TRIS, ATRI, USDOT, STATEDOT
  • Created Date: May 17 2017 5:37PM