I have removed about 1 metre wide of "crazy paving", on a driveway, to install a drainage pipe under it. As the regulations say, I placed
50mm thick (900mm wide) concrete slabs over the pipe spanning the trench. I have allowed for a 30mm gap between the top of the slabs and the underside of the paving stones. The latter are made from broken concrete 50mm slabs. The existing paving is resting on a thin layer of 10mm gravel which in turn is resting on tarmac about 120m thick. The paving has mortar on the joints, fairly wide in places.My question is, in order to replace the paving stones I removed, which is the best technique I can use in my situation to fix them so that they will not rock or sink with the weight of the cars?
Here is a picture of the driveway (if it works)
Thanks in advance
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