Delamination is a failure mode that can occur in layered materials. With respect to roads it refers to the loss of large discrete area of the wearing course layer, usually in conjunction with a clear delineation of the wearing course from the layer below.

Welshpool-Rd-Delamination-and-fatigue.jpg Austroads-Delamination-1.jpg Austroads-Delamination-2.jpg Austroads-Delamination-3.jpg

Possible Causes

  • Inadequate cleaning or inadequate tack coat before placement of upper layers.
  • Seepage of water through asphalt resulting in the breaking of the bond between the surface and the layer below.
  • A weak loose layer immediately under the wearing surface.
  • Adhesion of surface binder to the tyres of vehicles

External Links & References

  1. Wikipedia
  2. Google Search
  3. A Guide to the Visual Assessment of Pavement Condition
Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License