Effect of Anti-Icing Chemicals during Hoar Frost Situations
Publication: Journal of Cold Regions Engineering
Volume 36, Issue 2
Abstract
Anti-icing chemicals are used during hoar frost situations to avoid slippery road conditions. During hoar frost situations, humidity is transported from the air to the road surface. This leads to continuous dilution of the applied solution, until it eventually freezes. The protection time for a certain anti-icing application during hoar frost situations is therefore limited, and depends both on the dilution process and the freezing process. In this work, a laboratory setup has been used to study the effect of three commonly used chemicals, with different hygroscopic properties on the dilution process. An increased mass transfer rate up to 30% was seen for all chemicals in the start of the dilution process. The effect quickly diminished and after only 60 min it returned to a similar rate as without any chemical present.
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Acknowledgments
This study was sponsored by the Norwegian Public Roads Administration (NPRA). The work is part of the research program initiated by NPRA associated with the E39 coastal highway route along the west coast of Norway. The authors would like to thank Bent Lervik, Per Asbjørn Østensen, Frank Stæhli, and Tage Wessum for their technical support during the design and construction of the experimental setup.
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Published In
Journal of Cold Regions Engineering
Volume 36 • Issue 2 • June 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Mar 31, 2020
Accepted: Dec 12, 2021
Published online: Feb 4, 2022
Published in print: Jun 1, 2022
Discussion open until: Jul 4, 2022
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