Hot roads in the winter

Tests have been conducted on vulnerable road sections using waste heat from district heating plants to get rid of the ice.

Ice and frost are major issues on winter roads in Northern Europe. This is especially true for roads with steep slopes, viaducts and bridges. Tests have been conducted on vulnerable road sections using waste heat from district heating plants to get rid of the ice. And now another step is being taken through a project initiated by researchers at Chalmers University of Technology, with financial support from the Swedish Transport Administration and the Norwegian Public Roads Administration.

The method is based on a ground-source heat pump system, which stores heat in the bedrock, applying the same principle as when heating a building. But as a road has a much greater surface area than a building, it is a matter of being able to supply enough energy for the ground-source heat.

The solution currently being tested involves utilising the solar radiation from the summer months. The heat on the surface of the road heats a liquid circulating in pipes, which are installed in the base course if it is an asphalt pavement. When the pipes pass the ground heat well, the surrounding rock is heated up. The energy is then stored in the rock and used during the winter by pumping the heat back to the road.

“Another positive effect is that the road is cooled down when you capture the heat during the summer, which can reduce the risk of deformation and bleeding,” says Jan-Erik Lundmark, Senior Advisor Road Maintenance, the Swedish Transport Administration.

Sustainable Development

Sustainable governance

Eurobitume is carrying out longterm work to help the organisation’s members to prepare for upcoming challenges as the conditions change in the market. One example is the decision to form the Bitumen Sustainability Steering Group (BSSG), chaired by Carl Robertus from Nynas.

Projects

The Ryfylke tunnel, Norway

2013 saw the start of a major construction project – the Ryfylke tunnel, which opened to traffic just in time for the start of the new decade. This is the longest and deepest underground road tunnel in the world – 292 m below sea level – and it forms part of what is known as the Ryfast project.

Noted

Nynas exits US sanctions

The US Treasury Department’s Office of Foreign Asset Control (OFAC) announced today that Nynas is no longer being blocked pursuant to the Venezuela Sanctions Regulations. As a result of a corporate restructuring of the ownership of Nynas AB sanctions are lifted, and US persons and companies no longer require an authorization from OFAC to engage in transactions or activities with Nynas AB. As a consequence, general license GL 13E is removed.

Sustainable Development

Asphalt – a circular material

The reuse of asphalt is one area where the bitumen and asphalt industries contribute to a more sustainable utilisation of our natural resources.

Noted

The score for quality is lower

Roberto Crotti, World Economic Forum (WEF), on the state of the European road network.

Interview on the link between roads and competitiveness


Subscribe!

Get your Bitumen Matters.

Click here to get the magazine in English, Swedish or German.