Re: Base for concreting on2
Nov 19, 2007 8:32 pm
"Cracker dust" or "crusher dust" is the go around my area - as advised by all the concreters & bobcat drivers I've used for various work over the years.
This "cracker dust" is actually recycled concrete from a local recycling plant. It goes down easy, can be raked, then wacker-packed, and if you wet it down, it goes crusty & hard, providing a great base.
I put 450mm of it down in one area, under a 5 x 8m slab (dug out heaps of sloppy, wet clay) and packed it well between truckloads, and in 8 years that slab never cracked.
It's also providing a 150mm (and deeper in some spots) base for my old driveway (around 120sq m) and it's only ever copped 1 hairline crack across it, which started at a 270 degree brick corner - an area prone to break.
Re: Base for concreting on3
Nov 20, 2007 12:06 am
we use yellow brickies sand here. my mate has a concreting company and they use it too. we use it for paving, house slabs, footpaths etc It is leveled and compacted before the concrete is poured.
we use crushed and compacted limestone for road base as well.
typical sandgropers using sand
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