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

Concrete bridge deck close-up, showing scaling

Scaling on a bridge deck

Researcher(s)

Principal investigators:

Co-principal investigator:

Project status

Completed

Start date: 03/01/05
End date: 09/30/08

Publications

Report: Deicer Scaling Resistance of Concrete Pavements, Bridge Decks, and Other Structures Containing Slag Cement: Phase 1: Site Selection and Analysis of Field Cores (8 mb pdf) September 2008

Sponsor(s)/partner(s)

Sponsor(s):

About the research

Abstract:

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.