Dropwise condensation freezing and frosting on bituminous surfaces at subzero temperatures
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Date
2021-09-06
Publication Type
Journal Article
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yes
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Abstract
Freezing of atmospheric water on bituminous construction and road surfaces is a recurring event during winter. However, droplet freezing on bitumen and passive inhibition methods are poorly understood. Here we investigate relative humidity and substrate cooling effects on condensation freezing on subzero temperature bituminous surfaces and find that droplet freezing is explosive, with rapid local heating. We explain the related physics and find that relative humidity and cooling rate can affect droplet sizes and freezing temperatures. We then rationally embed phase change material microcapsules in bitumen, harnessing their latent heat to significantly delay freezing, demonstrating a viable option for frost mitigation.
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Publication status
published
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Book title
Journal / series
Volume
298
Pages / Article No.
123851
Publisher
Elsevier
Event
Edition / version
Methods
Software
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Date collected
Date created
Subject
Bitumen; Phase change materials; Condensation freezing; Icephobicity; Icing; Frosting; Modified winter asphalt binder; Freezing delay
Organisational unit
03462 - Poulikakos, Dimos (emeritus) / Poulikakos, Dimos (emeritus)