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.

Safety

Responsibility for our products and their impact

It is an overarching objective for Nynas to minimise the impact of its products on health, safety and the environment. Playing a key role in this work is Product HSE.

Talking point

Talking point: The COVID-19 pandemic

The ongoing pandemic has hit all countries hard, in terms of both health and the economy. But, more specifically, how has the situation affected the road industry?

Projects

High-speed quality surface

The most modern racing circuit in the Nordic region is now ready to host both Formula 1 and MotoGP events. We have paid a visit to the Finnish championship circuit KymiRing.

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.

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


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