High Friction surfacing
Engineering Highway Safety
A contributory cause of accidents, particularly in urban areas, is the condition of the road. When the surface is wet, skidding resistance is further lowered and accident potential increases. While traffic levels have risen over recent decades, the use of high friction surfacing at crossings, road junctions and other potential danger points has contributed to an overall reduction in the number of pedestrian accidents. The term high friction surfacing covers a range of material types with differing costs, effectiveness and durability. We offer a range of processes to provide cost-effective solutions for all applications and site conditions.
Spraygrip uses a bitumen extended epoxy resin binder. Established for over 30 years, Colas Spraygrip was the very first system to be awarded BBA/HAPAS Type 1 certification. BBA/HAPAS Type 1 approval is now obligatory where Clause 924 applies - Type 2 or 3 approval is not adequate. Type 1 systems give the highest performance and durability: they are designed to survive the greatest stress and traffic levels for 5 to 10 years. Spraygrip consistently out-performs this requirement.
Spraygrip is applied by our trained teams using purpose built machinery to achieve high consistency and strict adherence to quality standards.
Aggregates
Our anti-skid surfacing systems incorporate a range of aggregates designed to provide appropriate skid resistance, texture and colour, depending on the application. Calcined bauxite is used where the system is to meet the strict requirements of BBA/HAPAS Type 1. Pigmented calcined bauxite is used where high skid resistance is required for demarcation and priority areas. Where skid resistance is not the main aim, bus lanes can be treated with Spraygrip binder and naturally occurring red aggregate. The Spraygrip binder resists the effects of oil and diesel spillage.