Happy Gilmore

OK, I've seen a slab construction demonstration made from cement powder/peat and sand.

Now recently on a worksite I came across some broken chunks of lightweight concrete. It's purely cement/water and a chemical agent to induce very high porosity (it's 1/3 the weight of typical concrete as a result, just like a foam with a small internal bubble structure). No aggregate whatsoever. Strength isn't great but it will achieve 1/2 MPa. Initially it was quite weak and could be crushed by strong finger pressure but now it's cured another 5 wks and is notably stronger and not crushable by finger any more.

Any downsides to carving any of these chunks for use as a slab or mountain landscape to pot trees on etc? (I've got some sizable chunks, about 5 to work with) I accept it may crack at some point due to it's weaker structure. If I do create something I really like then I'd likely layer it underneath with a reinforced grout layer at that time.

Will the cement leach out in a harmful manner? I know other cement based pots are used but just want to ask prior to assuming what I might use would work.........

PS, any recommended ways to die it a darker colour to make it appear more rocklike? A little darker and it could likely look like weathered granite.

Thanks in advance!

thanks!

Advertisement