Tufflayer®
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.
Benefits
- 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:
era®/CleanAir®/AgeLast®/RecyclePlast®
Applications
- Concrete overlays
- Sites where reflective cracking is an issue
- Major projects
Tufflayer® technical data
| Typical material properties | Typical result |
|---|---|
| Target thickness | 25mm |
| Minimum overlay thickness | 35-40mm |
| Overlay thickness in heavily trafficked areas | 100mm |
| Typical laying temperature | 160-175°C |
| In situ voids | 0.5-2.0% |
| Resistance to deformation | Class 2 60°C (Cl 943 requirement) |
| Fatigue life | Up to 25 times higher when compared with a conventional bitumen solution* |
| Material property | Test specification | Typical result |
|---|---|---|
| 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 | ≤ 1.0mm/103 |
*Analysis of ITFT data using 40/60 DBM as a comparator.
Please see asphalt product matrix for further information or contact technical:
northasphaltsales@uk.heidelbergmaterials.com
southwestasphaltsales@uk.heidelbergmaterials.com
southwalesasphaltsales@uk.heidelbergmaterials.com
southeastasphaltsales@uk.heidelbergmaterials.com
