8 Pages

Use of entrained air concrete exposed to chlorides in non-freeze thaw environments: Effects on plastic concrete properties

J. Thesen R. El-Hacha

The Canadian Standards Association (CSA) Standard A23.1-04 requires air entrainment in concrete subjected to chlorides, not only for freeze-thaw environments but also for nonfreeze-thaw environments. Air entrainment presents some challenges in finishing of flatwork surfaces, for example parking deck slabs. Depending on the timing and amount of finishing, air entrained slabs can be susceptible to surface delamination. As a result, air entrainment cannot only add cost, it can make it more difficult to achieve a durable structure.