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Virtual Learning

Bridge Preservation By Design - Consideration of Zinc Coated Rebar

  • Mar 12, 2018 (2:00 - 3:30 pm CT; 1:00 - 2:30 pm MT)
    Virtual Learning (desktop or laptop access)


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The above opportunity and more can be accessed by visiting the TLN Learning Management System (LMS).


One of the keys to extending the life of highway bridges is preserving the reinforcing steel in the deck. The most common methods for preserving reinforcing steel are deck sealing and epoxy coating rebar. This presentation will cover the benefits of using reinforcing that is highly resistant to corrosion. Zinc coated reinforcing steel had been tried sporadically over the years with positive results, but recent coating processes have make zinc coated reinforcing steel competitive with epoxy coated reinforcing. Zinc coated reinforcing also provides better construction durability in comparison to epoxy rebar. Attendees will be presented the following topics in this presentation:

  • Zinc rebar history and current product status and practices
    • Fabrication Methods
      • Original coating methods
      • Continuous Galvanized Rebar
      • Bending/shaping rebar
  • Mechanics/Concepts of Uncoated Reinforcing Corrosion
  • Corrosion concepts with ZCR
  • Past and recent highway bridge applications that show value of using ZCR
  • Construction Considerations/Issues
    • Cutting in field
    • Treatment of holidays
    • Field bending
  • States using or testing ZCR
  • AASHTO Bridge provisions for ZCR
  • Cost Comparisons with other rebar options
  • Recent relative research


Martin Gagne graduated with a BASc in Metallurgy and Materials Science from the University of Toronto, and a MEng in Materials Science from McMaster University. He has over 30 years of experience in the metal industry, having worked on the development of micro-alloyed steels, and process and product improvements on continuous and post-fabrication hot-dip galvanizing. He has published many papers, and holds a patent on post-fabrication galvanizing.

Target Audience

Bridge designers, project programmers and estimators, materials engineers, construction inspectors, specification writers, district, regional and local road managers

NDSU Dept 2880P.O. Box 6050Fargo, ND 58108-6050