Journal
COLD REGIONS SCIENCE AND TECHNOLOGY
Volume 83-84, Issue -, Pages 89-97Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.coldregions.2012.06.009
Keywords
Corrosion inhibitor; Longevity on pavement; Winter road maintenance; UV-vis; DSC; Chloride concentration; Anti-icer residual; Anti-icer performance
Funding
- Transportation Pooled Fund led by the PNS Association through the Washington State DOT
- USDOT RITA
- ChuTian Scholar Visiting Professorship Fund by the Hubei Department of Education (Wuhan Polytechnic University)
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For snow and ice control on winter roads, the direct cost of corrosion-inhibited chemicals can be much higher than that of the non-inhibited chemicals. Yet, prior to this work, little was known about how long the corrosion inhibitors and the anti-icing products remain effective on the pavement once applied. This case study investigated the longevity of inhibitors and the performance of corrosion-inhibited anti-icing products after pavement application during winter storms. The field operational tests included the daily sampling of anti-icer residuals on the pavement for seven days after anti-icer application for a black ice event, a man-made snow event, and a natural snow event, respectively. Subsequently, multiple analytical methods were used to examine the properties of pavement-collected samples in the laboratory. It was found that more than 62% of the inhibitor in the CCB anti-icer and more than 20% of the chlorides (especially for Free-zGard and NaCl+GLT) could remain on the pavement four days after the application of liquid anti-icers to treat black ice. The longevity of chlorides and inhibitors on the pavement after anti-icer application can vary greatly depending on the pavement temperature, the amount of precipitation, etc. (C) 2012 Elsevier B.V. All rights reserved.
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