CABLE television company Nynex CableComms has teamed up with Bardon Roadstone to offer a new permanent pavement reinstatement package to local authorities.
Nynex proposes to cover entire pavements with a micro-asphalt overlay after backfilling the trenches dug for the installation of its cable ducts. This means that, instead of leaving the usually uneven strips of new asphalt along the existing pavement, the entire surface will be smooth and regular.
This not only looks better and reduces the risk of potholes forming, but also prevents the ingress of water between the old paving and the trench fill.
Under Nynexs proposal, the trench will be reinstated with Haucphalt, a cold-mix, cold-lay base course developed by Bardon Roadstone and incorporating a flux-free emulsion, called Nyset, developed by bitumen producer Nynas. This will then be finished with the overlay, or micro-asphalt wearing course developed by blacktop specialist Miles Macadam.
Paul Phillips, product development manager with Bardon Roadstone, said: Savings from single pass reinstatement will at least partially offset the additional costs of the overlay, and the finished pavement will represent a worthwhile improvement.
At about 1.20 a square metre, the overlay will cost local authorities more than traditional paving methods. But a key element of the Nynex proposal is a sliding scale of alternative finishes.
Local authorities will be able to choose a high-quality overlay cover with a five-year guarantee, or a thinner, cheaper top layer costing nearer 70 pence a square metre.
Details of the method were presented at a seminar, The Next Generation of Highway Surfacings, at the Institution of Civil Engineers yesterday (Wednesday).
Stuart Mitchell, of Nynex CableComms design and construction support department, said: The New Roads and Streetworks Act says we have to reinstate our trenches to the same standard as the surrounding pavements, but the pavements are often in a very poor condition.
Our proposal will mean pavements can be upgraded to an even higher quality than they were before we came along.