Effect of Salt Additives on Concrete Degradation (Phase II): Executive Summary

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Title

Effect of Salt Additives on Concrete Degradation (Phase II): Executive Summary

Authors

Jang, Ji-Won

Iwasaki, Iwao

Weiblen, Paul

Published Date

1995-02

Publisher

Minnesota Department of Transportation

Type

Report

Abstract

This research builds on a previous investigation, which found that corrosion-inhibitor-added deicing salts caused degradation of concrete by both anions and cations. The latest research phase looked at methods to detect the chemical reactions between concrete and corrosion-inhibitor-added deicing salts, and to determine the chemical compositions of the precipitates formed by chemical reactions between concrete and the corrosion-inhibitor-added deicing salts. The research led to the following conclusions: * a simple method was developed for the detection of chemical reactions between deicing chemicals and concrete; * the results provided clear evidence of the chemical reactions between concrete and the corrosion-inhibitoradded deicing salts; * the different amounts of precipitates (chemical reaction products) found in the test cells were dependent on the type and concentration of corrosion-inhibitor-added deicing salts; * precipitates formed by chemical reactions between deicing chemicals and concrete were identified by using chemical analysis, scanning electron microscopy, and X-ray diffraction analysis; * and precipitates were calcium and/or magnesium phosphates as a major component, and gypsum as a minor component.

Keywords

Precipitates

Corrosion-inhibitor-added

Deicing salts

Alternative chemical deicers

Chemical reactions

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Research Reports

Series/Report Number

MnDOT 96-10

Funding information

Minnesota Department of Transportation

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Jang, Ji-Won; Iwasaki, Iwao; Weiblen, Paul. (1995). Effect of Salt Additives on Concrete Degradation (Phase II): Executive Summary. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/155351.

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