Pavement Preservation
Preservatives work by applying a mineral based solution (e.g. Gilsonite) onto the existing surface course. This penetrates below the surface to a depth of a few millimetres dependent on the type of asphalt surfacing creating a Gilsonite rich membrane which binds together aggregate and surface fines. This membrane seals the pavement against water and salt ingress and seals in essential oils and resins.
Benefits
- Arrests the deterioration of the road surface and underlying road pavement structure.
- Extends the life of the surface course for 3-5 years depending on the pavement condition at the time of treatment.
- Rapid application, so minimal disruption to road users.
- Can be re-treated every 5 years.
- Requires no additional aggregates.
- Maximises the cost effectiveness of limited highway maintenance funds.
- Generates no waste.
- Typically 94% saving in CO2 emissions when compared to hot mix asphalt.
- Helps to prevent water ingress into the pavement structure.
Some Important Considerations
- The work should be carried out by a fully experienced contractor who can demonstrate that he has a record of quality work.
- Should only be applied onto surface courses that are sound and in reasonable condition to obtain maximum value.
- Can be used on all classes of road.
- The appearance of a treated road surface remains unchanged after treatment.