The Effect of Insulation on Road Surface icing

摘要

A presently ongoing Nordic project "Exclay Internordic Geoproject" aims at research into an overall utilization of expanded clay (exclay) in road embankments. One part of the project is concentrated on skid-resistance of exclay insulated and lightened roads, as insulation close to the road surface may prevent heat transfer from the underlying embankment and cause icing on the road. For this purpose two test sites were constructed with exclay insulation at different depths. This paper discusses temperature, dewpoint, skid-resistance measurements and temperature modelling at the Tuupakka test site and the applicability of the results to the purposes of the project.