Presentation by J Aldred, Durability of Calcium Chloride Pavements from Sydney Forum 06 May 2019
Calcium chloride is a cheap and effective accelerating admixture for Portland cement based concrete that has been used over many decades.
While calcium chloride significantly reduces setting time with little or no detrimental effect on mechanical properties, the principal concern is the depassivation of embedded reinforcement caused by the chlorides. This has lead to calcium chloride addition being effectively banned in most structural applications of reinforced concrete. Calcium chloride admixtures are still used in pavement repairs with short lane closure periods (e.g. RMS 3201) because of the rapid strength development.
This presentation looks at the effects of calcium chloride on the various properties of concrete which influence its durability in a pavement application.