High performance materials deliver a multi-layer crack resisting binder/surface course that is particularly suited to overlaying concrete carriageways.
Compared to traditional asphalt surfacing, Tufflex® offers high deformation resistance and a low air void content. The solution also delivers Highways England’s highest level of wheel rut resistance, level three. Its design uses specialised bitumens and incorporates best-in-class polymer technology to give it a flexibility that enhances fatigue resistance by absorbing traffic vibration. With its relatively low surface texture and designed low voids content, Tufflex® effectively protects the surface it covers from water ingress.
It is available in 6mm, 10mm, 14mm and 20mm nominal sizes and can be laid between 25mm and 150mm thick using a traditional asphalt paver with a 6-10 tonne roller. As a single layer application Tufflex® can half the installation time of traditional materials, reducing disruption to local services and traffic. Special attention should be given to compaction at the joints, which should be cut and painted with a bituminous joint paint to maintain resistance to the tensile stresses of turning vehicles. Installation should be in accordance with BS 59487.
Enhanced fuel resisting properties.
Tufflex® XD is an extra dense solution with a higher bitumen content for sites with lower texture depth requirements.
Details of constituent quality and layer thickness shown below:
- 6mm nominal size 30 – 60mm
- 10mm nominal size 40 – 80mm
- 14mm nominal size 50 – 100mm
- 20mm nominal size 60 – 150mm
- A best-in-class flexible polymer modified binder (PMB)
- Road engineers will benefit from the option of a multi-layer crack resisting asphalt solution
- Cost-effective over the whole life
- Quick installation – single layer application
- Prevents water ingress
- Highly sustainable and durable, and offers improved performance over conventional asphalt materials
- Increased flexibility
Overlay of concrete carriageways
Tufflex technical data
|Material property||Test spec||Typical result|
|Design void content||BS EN 12697-6||≤ Vmax 5.0%|
|Water sensitivity||BS EN 12697-12 Method B (i/C) BS EN 12697-23||≥ 80%|
|Binder drainage||BS EN 12697-18 Beaker Method||< 0.3%|
|Indirect tensile stiffness modulus||BS EN 12697-26 Annex C||>5,500 MPa (Tufflex® HD|
|RTPD (wheel tracking)||BS EN 12697-22 Procedure B WTS in Air||≤ 1.0mm/103|
|Fatigue (ITFT*)||BS DD ABF||≥ 1000000 cycles to failure @ 100µstrain|