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RN47
Widening, Lens, France
Location: RN47
Widening, Lens, France
Date: 1998
Client: Highways Authority
Technical Data: Traffic 80msa on chalk/clay
subgrade
40mm porous asphalt wearing course on
70mm bituminous binder course on
220mm GFA base (85% BURNT colliery spoil + 13% pfa
+ 2% lime) on
280mm LFA sub-base (91% fly ash / 4% lime / 5% gypsum)
on
400/500mm UNBURNT colliery shale capping
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