United States Department of Transportation
i
The Effects of DSS Corrosion Inhibitor on Physical Characteristics of Concrete
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2007-03-01
[PDF-594.73 KB]
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Edition:Final Report
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Abstract:Corrosion of reinforcing steel in bridge decks and subsequent deterioration of the structure continues to challenge the materials engineering community. Hycrete DSS is a new product which has shown promising corrosion inhibiting behavior in testing by several northeastern states. The physical effects of adding DSS corrosion inhibitor to a standard Kansas concrete mix were investigated in the summer of 2003 by the concrete research staff of the Kansas Department of Transportation. Four 1.70 cubic foot batches of concrete were produced: a control mix, a mix with air-entraining admixture, a mix with Hycrete DSS, and a mixture with Hycrete DSS and a de-foaming agent. Conclusions 1. Hycrete DSS, used with a defoaming agent, reduces the permeability to one-tenth to one-third of plain air-entrained concrete as measured by the evapo-transpiration test. 2. The use of the de-foaming agent with the Hycrete DSS additive is highly recommended to control the amount of air in the mix. In this test, the de-foaming agent reduced the total air content by over 50%, into the normal air-content range for air-entrained concrete. 3. The addition of Hycrete DSS causes an approximately 10% strength reduction from expected valued for concrete with similar air contents. 4. The addition of Hycrete DSS had no appreciable effect on the slump of the concrete or the proportion of entrained air content to total air content.
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