Comprehensive Evaluation of Design Standards, Materials, and Construction for Slip Formed Concrete Bridge Railings to Alleviate Sources of Early Age Deterioration

The Ohio Department of Transportation (ODOT) is continually looking for ways to alleviate sources of early age deterioration in slip formed concrete bridge railings, thus extending service life and reducing maintenance costs. Horizontal cracking, delaminations and spalling due to poor consolidation around the longitudinal reinforcement is a major problem ODOT is experiencing. This problem likely results from multiple sources. One suspected source is movement of the concrete reinforcement during slipforming operations. As the slipform machine progresses, the cage deforms in the direction of movement and rebounds slightly after placement. Because the concrete is low slump, when the cage rebounds, a void may be created. In January 2020, ODOT introduced stiffening reinforcement to standard drawing SBR-1-20 in order to increase cage rigidity during slipforming operations. The actual effectiveness of this change can only be determined by data driven facts that need to be collected and analyzed. The goal of this research is to enhance design standards, construction specifications and material specifications that promote the slip forming of concrete bridge railings that are free of defects for extended service life.


  • English


  • Status: Active
  • Funding: $723253
  • Contract Numbers:




  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Managing Organizations:

    Ohio Department of Transportation

    Research Program
    1980 West Broad Street
    Columbus, OH  United States  43223
  • Project Managers:

    Martindale, Jill

  • Performing Organizations:

    Ohio State University, Columbus

    Department of Civil Engineering
    Hitchcock Hall 470
    Columbus, OH  United States  43210
  • Principal Investigators:

    Burris, Lisa E

  • Start Date: 20220930
  • Expected Completion Date: 20270930
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01861402
  • Record Type: Research project
  • Source Agency: Ohio Department of Transportation
  • Contract Numbers: 37850, 115887, 136520
  • Files: RIP, STATEDOT
  • Created Date: Oct 18 2022 3:57PM