Deicer Scaling Resistance of Concrete Mixtures Containing Slag Cement Phase 3, January 2014

(2014) Deicer Scaling Resistance of Concrete Mixtures Containing Slag Cement Phase 3, January 2014. Transportation, Department of

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Abstract

Concern has been expressed about the deicer scaling resistance of concrete containing slag, especially when the dosage of slag exceeds 50% of the total cementitious material in the mixture. Much of the concern appears to be based on the results of laboratory scaling tests based on ASTM C 672, despite indications that such mixtures often perform well in the field. The initial phase of this study showed that construction-related issues played a bigger role in the observed scaling performance than did the amount of slag in the concrete mixture. The work also indicated that the test method (ASTM C 672) may be more severe than most environments. A second phase developed an alternative laboratory test method to ASTM C 672 that would better represent the field performance of concretes, based on a method from the Canadian Quebec Ministry of Transportation. The work described in this report was to repeat some tests using similar materials in a second laboratory to evaluate repeatability of the test methods.