Journal Published Online: 29 November 2021
Volume 50, Issue 2

The Effect of Additives on Water Vapor Condensation on Bituminous Surfaces

CODEN: JTEVAB

Abstract

Water condensation and freezing on asphalt roads can lead to slippery conditions, which are responsible for many winter accidents and have caused an overreliance on mostly environmentally damaging and pavement degrading deicing chemicals and salt, which requires active maintenance. Bitumen is a mechanically and chemically complex material mainly consisting of various hydrocarbon-based chemicals groups. Additionally, bitumen makes up approximately 5 wt.% of the asphalt concrete mixture because of its binder role and coating function of the aggregates, can control the bulk mechanical properties and surface properties of the asphalt mixture. Condensation as the first step and later freezing phenomena are investigated in this study and from ambient humidity toward understanding the fundamentals of icing on bituminous surfaces. Condensation experimental results show selective wettability of chemically and mechanically district bitumen surface domains. The effect of different bitumen modifiers of polyethylene terephthalate, polyamide (PA 66), polyacrylonitrile, and Sasobit wax at 1 wt.% were studied on condensation freezing and bitumen water affinity.

Author Information

Tarpoudi Baheri, F.
Department of Mechanical and Process Engineering, Laboratory of Thermodynamics in Emerging Technologies, ETH Zurich, Zurich, Switzerland Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
Rico Luengo, M.
Department of Mechanical and Process Engineering, Laboratory of Thermodynamics in Emerging Technologies, ETH Zurich, Zurich, Switzerland
Schutzius, T. M.
Department of Mechanical and Process Engineering, Laboratory of Thermodynamics in Emerging Technologies, ETH Zurich, Zurich, Switzerland
Poulikakos, D.
Department of Mechanical and Process Engineering, Laboratory of Thermodynamics in Emerging Technologies, ETH Zurich, Zurich, Switzerland
Poulikakos, L. D.
Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
Pages: 10
Price: $25.00
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Stock #: JTE20210251
ISSN: 0090-3973
DOI: 10.1520/JTE20210251