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Method B – Permanent binder course reinstatement

In flexible structures, the backfill, sub-base and binder course must be reinstated to permanent standard at the first visit.
The permanent binder course material, or an alternative interim material, must be extended to the running surface with or without a thin separating medium at the binder course/surface course interface (as appropriate). The alternative interim material may be a bituminous mixture.
On the second visit, all interim surfacing materials must be removed to the top of the binder course and an appropriate permanent surface course laid.
Where a sand separation layer is present, before reinstating the permanent surface course, the sand must be removed, the surface brushed clean and a bond coat applied.