At position manufactured rubber asphalt with the so-called wet method, i.e., mixing of rubber granules in the binder (bitumen). The rubber modified bitumen is then the asphalt plant in the traditional way. The proportion of rubber granules in the binder is about 17-20%, which means that the interference amount of rubber is about 1.4-2% of the total amount of asphalt mass based on a content of the rubber modified bitumen of about 8%. Rubber granules should be from car tires and / or truck tires. The relationship between these should be kept constant during production.
Based on current knowledge, it has been seen that the coating compared to conventional asphalt coating reduces noise and that it gives rise to a reduction in so-called water film and thus provide better visibility. The coating also means reduced use of adhesive and allows thinner coating layers. To counter example, wear and rutting are the challenges of adapting the coating to Swedish conditions and to develop manufacturing processes to optimize the mixing stage, where many parameters affect the coating properties.
On Trafikverket's website for more information on rubber asphalt.