Heidelberg Materials Asphalt

Tuffgrip® is our established thin surface course system (TSCS) and is produced in accordance with the Specification for Highway Works (SHW) 942. It was developed for motorways and other major highways.

Tuffgrip uses high quality, high polished stone value (PSV) aggregates and our specially developed polymer modified bitumen (PMB). Tuffgrip is tough on noise, skid resistance and wet weather spray with a texture that is retained throughout its service life. Tuffgrip is also tough enough to stand up to heavy traffic yet provide an ultra-smooth ride. Tuffgrip is laid by Heidelberg Materials’ contracting division and comes with a 5-year guarantee underwritten by the contractor in accordance with SHW Clause 942.

Tuffgrip can also be produced using Heidelberg Materials’ era 140 warm mix asphalt process, meeting the requirements of current National Highways major network specifications.


Installation by Heidelberg Materials.


  • 5-year performance guarantee
  • Excellent resistance to deformation
  • Enhanced ride quality
  • Reduced noise
  • Excellent spray reduction
  • Reduced CO2 when supplied as era 140
  • 100% recyclable

Available with the following options:


  • ​​​​​​​Highways/motorways
  • Major projects
  • Major local authority networks

Tuffgrip technical data

Coarse aggregate
Los Angeles abrasion value 30 max
Aggregate abrasion value As specified in SHW
Clause 942 (Appendix 7.1)
Flakiness index 20 max (6mm 30max)
Nominal sizes  6mm; 10mm; 14mm
Binder High performance Polymer
Modified Bitumen (PMB)
Layer thickness
Details of constituent quality and layer thickness shown below
6mm nominal size 20 – 30mm
10mm nominal size 25 – 50mm
14mm nominal size 35 – 50mm
Surface texture (on installation)
10mm medium texture 1.1 – 1.6 mm
14mm medium texture 1.3 – 1.8 mm
  (All NH Clause 942 Level 3)
Road and laboratory test results
Torque bond Typical figures +800 KPa
Noise reduction NH Clause 942

Typical performance figures

Material property Test specification Typical result
*Design void content BS EN 12697-6 Vmin 1.0% – Vmax 5.0%
Water sensitivity BS EN 12697-12 Method A (ITSR) BS EN 12697-23 ≥ 80%
RTPD (wheel tracking) BS EN 12697-22 Procedure B WTS in Air ≤ 1.0mm/103

*Where specified in appendix 7/1.

Please see asphalt product matrix for further information or contact technical: