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Posted by RicodJour on November 1, 2006, 8:45 am
DanG wrote:
> Most CMU products are made with Hadite or some other lightweight
> aggregate to keep the unit weight down. If weight is not a factor
> you might be able to go to the local concrete ready-mix company
> and buy concrete sand which will have sand and rock up to 1/4".
> This might make the look you are after. Be aware, if you are
> trying to match color, that concrete is very subject to the color
> and source of the sand.
And, like mortar, to the amount of water in the mix.
R
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> What happens to concrete as the ratio of aggregate to sand is
> reduced? I am asking about this because I am attempting to
> duplicate some factory-made patio blocks, and they appear to use
> a relatively small amount of some finely-screened pea gravel. I
> think they do this so that their split faces to not show a lot
> of rock.
> Thanks
> -Mark
>