Zero carbon dioxid technology for asphalt

Important results from the project

The purpose of the project is to develop a fossil free technology for the heating of tarmac and asphalt. Microwave technology together with mixing in an effective microwave absorber, magnetite, has been used to reach enough heating capacity. The goal is to identify needed capacity on the micro wave generators, type and amount of magnetite needed, where in the production chain microwave technology can replace present heating systems based on fossil fuel and include all the parts involved in the asphalt business.

Expected long term effects

Already a smaller amount of magnetite increases the heating capacity when applying microwaves to heat asphalt. The technology can be used to heat recycled asphalt and dry ballast material at the asphalt plant, dry “cold asphalt” and recycle of asphalt on the road and to repair pot holes. The technology makes it possible to more accurate control the temperature improving the working environment. When used for large material flows the microwave technology needs to be developed.

Approach and implementation

Laboratory work determine material properties and temperature development for different material mixes have been performed. Visits has been made to asphalt plants where needs, possibilities and limitations have been identified. Simple test in a manufactured prototype have been made. Analysis to ensure that the technology can work in a real situation for heating mastic have been done. Terms and conditions governing the relation between the parties for future work have been proposed.