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Projects

All the different projects within Forever Open Road (FOR) can be found here. Please contact  info@fehrl.org if you would like to add a project (Accessible for registered FEHRL staff only).

GEOTHERMAL DE-ICING

Prevention of icing by the supply of geothermal energy


GEOTHERMAL DE-ICING

Generally the asphalt surfacing on bridge decks - especially on steel bridges - is exposed to a higher risk of prematurely icing compared to asphalt pavements. In such a case, using the geothermal energy for heating the asphalt surfacing on the bridge deck can possibly prevent the need for winter maintenance, minimize the use of de-icing salt and contribute to increased road safety. The most common methods to prevent this risk are to grit the bridges early or to install de-icing spray units. But both methods seem to be disadvantageous with the prospect of both a) environmental aspects and b) the corrosive characteristic of steel structures. The first application of this bridge heating technology in Germany will be realized in 2010 on an arched composite road bridge with a suspended deck in Berkenthin – a village in the north of Germany. In August 2010 the tubes were positioned on the bridge deck and connected with the heating system, after this the top layer of mastic asphalt will be build and the bridge will be opened. Numerical investigations and laboratory tests demonstrated that the heating tubes should be positioned in a distance of 10 cm in the middle of the pavement height as an optimal solution for the heat flux and a homogeneous surface temperature. For this a fountain with a depth of 80 m was drilled and groundwater with a temperature of approx. 11°C will be piped with the objective of warming the asphalt surfacing during the winter. In addition such a system can also be used in summer for cooling the asphalt layer in order to reduce the unwanted rutting and help to minimize maintenance costs.

 
   

BASIC PROJECT DATA

project status finished
coordinating organisation BASt Federal Highway Research Institute
budget 0 €

PUBLIC CONTACT

contact to: Ursula Blume
address: BASt
phone: +49 2204-43122
e-mail: BlumeU@bast.de

PROJECT PROPERTIES

 

theme(s)

   Energy, Environment & Resources
   Safety & Security
 

Partners

   BASt - Federal Highway Research Institute BASt
   Landesbetrieb Straßenbau und Verkehr Schleswig-Holstein (LBV-SH)
 
 

scope

   FOR
 

participating countries

   Germany


 
 

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07.03.2016
18.01.2016
11.01.2016
30.11.2015
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