Asphalt rubber pavements in Sweden: noise and rolling resistance properties

Asphalt rubber (AR) pavements of the type which is commonly used in Arizona have been adapted for the Swedish climate and conditions. Both a gap-graded and an open-graded version have been constructed at several places and with a few different aggregate sizes. The objective of the work has been to determine the properties of these pavements in com-parison to conventional SMA and porous asphalt pavements. In this case the focus has been on noise and rolling resistance properties and how these properties change with pavement age or traffic exposure.

Measurements so far in this study have indicated a couple of dB extra noise reduction due to the use of AR technology. Regarding rolling resistance properties, AR is neutral; i.e. proper-ties are similar to those of SMA and porous asphalt. There are indications that the favourable effects of AR might increase with pavement age, but more time is needed to verify this.

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