Cooling temperatures send contractors scrambling to complete unfinished projects before winter threatens to stop or seriously hinder construction. However, some projects will inevitably have to be delayed until next season, leaving contractors with the question of how to protect materials and equipment already on the jobsite.
Although focused on extending the service life of reinforced concrete, Cortec’s line of MCI technology for the construction industry includes complementary corrosion solutions to help contractors bring their jobsites safely through the winter elements.
Freezing temperatures mean grouting delays for post-tensioning (PT) projects. However, for bridges, parking garages, or buildings where PT tendons have already been installed, grouting delays leave tendons at risk for corrosion and the potential loss of integrity by the time grouting occurs.
The most practical option is MCI-309, a migrating corrosion inhibitor powder that can be fogged into PT ducts after the tendons are placed. By capping the ducts, contractors can trap protective vapors until temperatures warm sufficiently for the project to continue. When work resumes, contractors typically do not need to flush MCI-309 out of the ducts before grouting, eliminating a step that could introduce corrosives.
MCI CorShield offers an anticorrosion coating solution that can be brushed onto exposed rebar, leaving a thin protective film that in many cases may not even need to be removed before construction can continue. The same coating can be sprayed onto new rebar waiting to be used on the jobsite.
More info www.cortecvci.com
