Deicer Scaling Resistance of Concrete Pavements, Bridge Decks, and Other Structures Containing Slag Cement: Phase 1: Site Selection and Analysis of Field Cores

Project Details
STATUS

Completed

START DATE

03/01/05

END DATE

09/30/08

RESEARCH CENTERS InTrans, CP TECH, CTRE
SPONSORS

Connecticut Department of Transportation
Federal Highway Administration
Iowa Department of Transportation
Kansas Department of Transportation
New York State Department of Transportation
Ohio Department of Transportation
Slag Cement Association

Researchers
Principal Investigator
Scott Schlorholtz

Faculty Affiliate

Co-Principal Investigator
Doug Hooton

University of Toronto

About the research

The initial phase of this project was conducted to determine whether adding slag cement to concrete mixtures increases the surface scaling caused by the routine application of deicer salt. A total of 28 field sites that included portland cement concrete pavements and bridge decks containing slag cement were evaluated. Laboratory testing was conducted on 6 in. diameter core samples extracted from 12 field sites and 3 subsites, including 6 pavement sites and 6 bridge decks. The laboratory testing program consisted of scaling tests, rapid chloride permeability tests, surface chloride profile tests, and petrographic examination. The results of this study suggest that construction-related issues played a bigger role in the observed scaling performance than did the amount of slag in the concrete mixture.

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