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Rubber Asphalt

Published: 11 September 2012

Rubber Asphalt is an abbreviation for asphalt containing shredded rubber from used tires. The technology was originally developed in the U.S., where it has been used on a large scale since the 1980s. Rubber asphalt is considered to provide improved resistance to wear and are perceived to be quieter.

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.