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Postby dannycooper » Wed Jan 23, 2008 4:54 pm

I have a concrete driveway which slopes to one side. I want to lay new concrete over the top to level it in order to build a 3m x 3m shed. Are there any considerations to be aware of and will the new concrete bond ok?
Also is there a special technique for doing this??

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Postby superqaz » Fri Jul 19, 2013 9:08 am

i just spoke to a concrete specialist at Tarmac , he said the if the new slab is bonded to the old one it will crack like crazy paving, because the old one will not move as its cured but the new one will move. some sort of DPM is the answer
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Postby welsh brickie » Sat Jul 20, 2013 2:11 pm

if the original concrete is stable, and your going to put new concrete on top the thickness needs to be a minimum of 100mm its also best to use a reinforcing mesh.
To bond the two layers together use a pva solution and pour it on and brush it in
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