Stone Mastic Asphalt is a thin asphalt surfacing mix, which has very good rut resistance properties and excellent durability compared to standard asphalt. It can also be used as a base course mix. While it is primarily used for heavily trafficked roads and is the preferred surfacing in some countries, SMA can be used for all types of pavements. In addition to its structural capabilities, the SMA surface has a rough texture which offers a good skid resistance over time, and can reduce road surface noise.

Advantages of SMA

• Industry acknowledged deformation resistance
• Good skid resistance
• Good durability (slow ageing) due to higher binder content
• Good low temperature performance
• Wide range of applications
• Longer service life than dense graded asphalt
• Reduced road surface noise
• Good surface texture
• Good flexibility and resistance to fatigue
• Suitable for all traffic volumes, particularly for high traffic volumes and heavy traffic
• Can reduce rehabilitation and therefore the disruption to traffic