Title: Rapid Chloride Test Comparisons

Author(s): James R. Mackechnie and Mark G. Anderson

Publication: Concrete International

Volume: 22

Issue: 5

Appears on pages(s): 40-49

Keywords:

DOI:

Date: 5/1/2000

Abstract:
The chloride resistance of concrete is critically important to the durability of reinforced concrete structures exposed to deicing salts or marine condition. Three rapid chloride tests were evaluated in terms of their suitability over a wide range of concrete types and their reliability in predicting long-term chloride resistance. Test results measured at 28 days were found to exhibit significant differences and biases. This was in part due to short-comings in the tests and also because of the varying rates of maturity of concretes. The reliability of the rapid chloride tests in predicting longer-term chloride resistance of concrete was questionable in some cases. Predictions of chloride ingress can only be made when allowance is made for long-term effects, such as continued cementing reactions and chloride binding, which affect chloride resistance of concrete