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Evaluation of Test Methods for De-icer Scaling Resistance of Concrete

The standard ASTM C672 de-icer salt scaling resistance test has been found to be overly aggressive to concretes containing slag cement. It was compared to the newly proposed ASTM WK9367 method, based on the Quebec BNQ test, as well as several modifications, including use of an accelerated curing regime developed in Virginia (VADOT). Sixteen concrete mixtures were studied using high-alkali cement, low-alkali cement, grade 100 slag and grade 120 slag with slag contents of 0%, 20%, 35% and 50%. Vinsol resin air-entraining admixture was compared to Micro AirĀ®.
Reducing the water cement ratio from 0.42 to 0.38 had the biggest impact on improving scaling resistance of slag concretes. In general, increased slag contents increased scaling regardless of the test method used. The Micro AirĀ® admixture provided a lower air void actor and higher hardened air content compared to Vinsol resin.

Identiferoai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/33570
Date27 November 2012
CreatorsVassilev, Dimitre Georgiev
ContributorsHooton, Robert Douglas
Source SetsUniversity of Toronto
Languageen_ca
Detected LanguageEnglish
TypeThesis

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