Validation of new Dutch volumetric mix design method for SMA with mechanical tests and field trials

J. Voskuilen ; Ministerie van Infrastructuur en Milieu, Rijkswaterstaat, Dienst Verkeer en Scheepvaart (RWS, DVS), M. van de Ven ; TU Delft


SMA is used worldwide and known as a very durable mix with excellent functional properties when well designed. In the Netherlands early rutting of SMA has been reported in some cases with the existing mix design method. For this reason a renewed volumetric mix design method was developed. The core of the new volumetric method is the determination of the voids in the compacted stone skeleton (HRS) and the abrasion of the stone fraction of the mix. With a computer program the volumetrics of the mix are calculated based on the volumetrics of the compacted available stone fraction. A shift factor for the voids content has been developed based on compaction results of mixes that perform well. Before production at the plant the HRS value of the available stone fraction at the asphalt plant has to be determined and compared with the mix design. The results of three field trials with SMA 0/11(maximum stone size 11 mm) are described and compared with the new mix design procedure.

[10] p.
Paper ISAP Nagoya 2010