Between October 1994 and October 1995, a unique bridge was under construction in North America. Of special note was the fact that the bridge was privately built and leased to the City of Winnipeg for approximately 20 years. Another special feature was the use of MCI®-2000 corrosion inhibiting admixture in the bridge decking, added to extend the service life of this private investment. MCI®-2020 was applied to sign-support columns aboveground. It was also slated for use in a number of Winnipeg bridges the following year, as provincial and civic engineers were recommending the use of MCI® Technology in all bridge projects at this time.

Read the full case history here.

Keywords: Cortec, MCI, Migrating Corrosion Inhibitors, From Grey to Green, corrosion inhibiting admixture, MCI admixtures, concrete admixtures, concrete durability, extend service life, bridge construction

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The Hakalau Bridge in Hawaii was suffering from steel girder corrosion caused by volcanic sulfuric dioxide as well as chloride enriched moisture from the Pacific Ocean. Some of the rusty areas on the bridge were especially hard to clean. CorrVerter® was used to prime the tight rust in these areas where good surface prep was difficult to achieve. MCI®-2005 NS was added to new concrete poured to cover the foundation and enhance the structural strength of first level bents in case of seismic activity. MCI® Mini Grenades were used in repair mortars for hand lay-up. The products’ ease of use and protective abilities made them excellent solutions to extend the expected service life of the structure.

Read the full case history here.

For a PDF version please click here.

November 04, 2021

Historical structures have significant cultural values and part of preserving our heritage is preserving these structures. Due to their importance and uniqueness, they typically require special care when it comes to rehabilitating them. Cortec® Corporation was involved in the restoration of the ring walls that exhibited signs of deterioration due to carbonation induced corrosion that was clear in the shallow concrete cover. Cortec’s surface applied corrosion inhibitor, MCI®-2020, was used to control corrosion of the imbedded reinforcement, The goal was to extend service life by 20 years using a system of surface applied corrosion inhibitor and followed up with water repellent treatment. Cortec® was able to show the effectiveness of the inhibitor and by taking corrosion rate measurements using a linear polarization device.

Read the full case history here.

For a PDF version please click here.

Keywords: MCI, Migrating Corrosion Inhibitors, Cortec, concrete surface preparation, concrete additives, concrete, corrosion, corrosion inhibitor, surface applied, grouting, post-tensioning, rebar, restoration, concrete restoration, concrete sealant, service life, reinforced steel, concrete service life, from grey to green post tensioning cables, construction delays, grouting delays, grouting delay requirements