United States Department of Transportation
i
Final report for Verglimit at hole-in-the-wall slide section : experimental feature evaluation.
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1989-06-01
[PDF-376.40 KB]
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Abstract:In 1983, experimental Verglimit overlays were placed on two Oregon bridges known to have icing problems. The performance of the test overlays, constructed on the Salmon River Bridge in Clackamas County and the Quartz Creek Bridge in Clatsop County, was very disappointing. While the Verglimit appeared to be effective in melting snow and reducing the formation of ice on the decks, the material failed and had to be replaced. This failure was attributed to job specifications which did not include all of the Verglimit supplier's recommendations and poor construction practices. Construction problems included excessive liquid asphalt content and low compaction. These two projects did not allow for an accurate appraisal of Verglimit, so a new site was selected for testing the deicing chemical.
Because of the previous problems, the primary objective of this evaluation was to determine if a durable pavement could be placed with Verglimit in the asphalt concrete. The secondary objective was to determine if Verglimit was effective in de-icing the pavement and how long it would last. The final objective was to observe guard rail and sight posts to determine if there was increased corrosion from the de-icer.
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