Tufflayer® offers an alternative SAMI (stress absorbing membrane interlayer) to asphalt reinforcing layers by providing a highly polymerised impermeable crack relief interlay solution that also protects lower layers from water ingress.
Laid by conventional paving equipment the Tufflayer solution uses a specially designed polymer modified bitumen (PMB). Tufflayer achieves optimum flexibility, enhances fatigue resistance and significantly delays the effects of reflective cracking. Avoiding the use of geogrids also reduces on-site equipment and personnel, reducing the health and safety risk.
The unique Tufflayer design achieves a low voids impermeable finish making it ideal for concrete overlays or any site where reflective cracking may be an issue.
Using Tufflayer as an alternative to geogrids provides a superior design solution at reduced whole life cost.
- High levels of flexibility
- Significant delays in reflective cracking
- Protects lower pavement from moisture ingress
- Increased durability
- Cost and carbon effective over the whole life
- Reduced CO2 when supplied as era 140
- 100% recyclable
Available with the following options:
- Concrete overlays
- Sites where reflective cracking is an issue
- Major projects
Tufflayer® technical data
|Typical material properties
|Minimum overlay thickness
|Overlay thickness in heavily trafficked areas
|Typical laying temperature
|In situ voids
|Resistance to deformation
|Class 2 60°C (Cl 943 requirement)
|Up to 25 times higher when compared with a conventional bitumen solution*
|Design void content
|BS EN 12697-6
|Vmin 0.5% – Vmax 3.0%
|RTPD (wheel tracking)
|BS EN 12697-22 Procedure B
WTS in Air
*Analysis of ITFT data using 40/60 DBM as a comparator.