Densoband is a polymer modified bitumen strip which is approved for use in asphalt surface course
joints for asphalt, and asphalt to concrete interface as an alternative to the previously commonly used bitumen.
It used more than 700 tons of existing porous surface course
recycled material on the new road surface using 40% RAP material - a first on a motorway or major A road maintained by the Highways Agency.
Head of Gwynedd Consultancy Service Huw Williams said: "Due to a problem relating to the aggregate used in the surface course
(a problem which has affected a number of road schemes across Wales and possibly beyond), a significant amount of the surface course
is probably going to have to be removed and new material placed."
In West Virginia, the DOT is using recycled blast furnace slag as the aggregate of choice in the western part of the state for the majority of asphalt surface course
below the finished grade level and the court's surface course
should be tapered from 6 in.
In hot-mix asphalt, the material can be used as aggregate for base course, surface course
, shoulders, approaches and patching.