Project Overview
The Hakalau Bridge in Hawaii was experiencing significant deterioration due to steel girder corrosion caused by volcanic sulfuric dioxide and chloride-rich moisture from the Pacific Ocean. Many areas of the bridge exhibited severe rusting, particularly locations where surface preparation was difficult to perform effectively. This corrosion threatened the durability and structural safety of the bridge, prompting the need for a targeted retrofit solution.
Challenges
• Steel girder corrosion from sulfuric dioxide and chloride exposure
• Severely rusted sections that were difficult to clean
• Need to restore surface integrity before applying protective systems
• Requirement to enhance structural strength of first-level bents for seismic activity
Solution Applied
To address the corrosion issues and structural demands, several Cortec® products were incorporated into the retrofit process:
CorrVerter®
Used as a primer to treat rusted steel surfaces where achieving adequate surface preparation was challenging.
MCI®-2005 NS
Added to new concrete placed over the foundation to improve durability and strengthen the first-level bents for seismic resistance.
MCI® Mini Grenades
Used in repair mortars for hand-applied rehabilitation work.
These products were selected for their ease of use, protective properties, and effectiveness in extending the expected service life of the structure.
Outcome
The combined application of Cortec® corrosion solutions provided the protection needed to rehabilitate damaged steel components and enhance the seismic performance of the structure.
The products’ reliability and protective capabilities made them well-suited for long-term durability in the bridge’s aggressive coastal environment.