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Posted: Thu Sep 02, 2010 9:08 pm
by msh paving
wacked over the high blocks then try to get sand off best we could,was a shit job,there was hundreds of metres on the inner releave road at Gt yarmouth norfolk, something the consultants drempt up to stop people crossing the dual carrage way, never seen it again MSH 
Posted: Thu Sep 02, 2010 9:09 pm
by msh paving
we was using 60mm and 80 mm blocks it paid the bills all you could say MSH
Posted: Sun Sep 05, 2010 10:46 am
by Tony McC
That's simply a variation on a deterrent paving layout.
The usual method of construction is to lay all one thickness of block (doesn't really matter whether it's the 60s or the 80s) and compact WITHOUT sanding the joints. Then, alternate blocks are removed using a block extractor and replaced with the other size. The jointing is then brushed in.
As the laying courses was compacted in the previous step, and the fact that the whole point of the surface is to have uneven blocks, it doesn't matter that the blocks placed second haven't been compacted.
I too have seen it used as an alleged high-traction surface on a driveway in western Scotland. Load of bollocks! Complete waste of time and effort, and as Mark says, a fantastic silt trap.
Posted: Sun Sep 05, 2010 12:56 pm
by Dave_L
There is some of this paving on the pedestrian/cycle approaches to a large new roundabout locally.