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laying drivewith block pavers squares filled with grit/cemet

Postby slap2011 » Tue Jan 10, 2012 9:05 pm

laying drive with block pavers in 1200mm squares filled with grit/cement miw but the grit /cement mix is breaking up and it more like copacted grit was mixed as 4/1 mix this is obveusly not strong enough any advise out thier
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Simply Build It

Postby welsh brickie » Wed Jan 11, 2012 12:03 pm

Its my understanding that the cement your laying is a 4:1 mix and it keeps cracking?
The mix you require is 6 sharp sand 1 cement and 1 gravel either 6mm or 10mm will do.Its the gravel that gives the concrete its strength, the thickness also needs to be a minimum of 100mm .
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