Campus Units

Geological and Atmospheric Sciences

Document Type

Conference Proceeding

Publication Version

Published Version

Publication Date

2000

Journal or Book Title

Proceedings of the Mid-Continent Transportation Symposium 2000

First Page

151

Last Page

155

Conference Title

Mid-Continent Transportation Symposium 2000

Conference Date

May 15-16, 2000

City

Ames, Iowa

Abstract

The deleterious effects of deicers on concrete pavements and bridges have concerned concrete researchers for several decades. The present study experimentally investigates the effects of different deicers on concrete deterioration. Laboratory simulations of environmental conditions (wet/dry and freeze/thaw cycling) were conducted on highway concrete samples with various deicer chemicals (NaCl, CaClv MgC12, calcium magnesium acetate (CMA) of 5 different Ca/Mg ratios, Ca-acetate, and Mg-acetate). Each deicer produced characteristic effects on the concrete samples by physically and chemically altering the dolomite coarse aggregate, the dolomite coarse aggregate-paste interface, and cement paste. Chloride solutions commonly promoted decalcification of paste and altered ettringite to chloroaluminate. Magnesium-bearing deicer solutions ( e.g., CMA, Mg-acetate and MgC12) caused severe paste deterioration by forming brucite and noncementitious magnesium silicate hydrate. For acetate solutions, the effects caused by Ca-acetate on concrete deterioration was much less severe than those caused by Mg-bearing acetates. For the experimental conditions utilized herein, NaCl solution was the least deleterious to the cement paste and aggregate.

Comments

This proceeding is published as Lee, H., Cody, A.M., Cody, R.D., and Spry, P.G., 2000, Effects of various deicer chemicals on pavement concrete deterioration. Mid-Continent Transportation Crossroads Symposium, Proceedings, Ames, Iowa, p. 151-155. Posted with permission.

Copyright Owner

Iowa State University

Language

en

File Format

application/pdf

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Article Location

 
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