Concerning the article “Specifying Concrete for Performance” in the January issue of Concrete Construction.
The first line of defense in preventing the corrosion of reinforcing steel in concrete is to use good concreting practices. But designers and contractors can add other corrosion-control weapons to their arsenal including corrosion-resistant rebar; corrosion-reducing additions or admixtures; and concrete membranes, coatings, and sealers that block chloride entry. Here's a summary of the options and their relative costs.
Within the last few years, major U.S. admixture suppliers have introduced a new category of chemical admixtures—shrinkage-reducing admixtures (SRAs).
The U.S. Federal Government has decided that it will switch to a metric-based system of weights and measures.
