[Cob] Burnt clay

[Marlin Nissen]

I think Georgie is looking for the pozzolan 'Grog'
that we used in our Roman Concrete mortar at the
Madison project...unfortunately ours was bought
locally,,,,worked great BTW..

Marlin


photos of foundation:
http://tona.bigbite.org/album/willy-st-coop-2004/

www.outtathebox.org

--- Amanda Peck <ap615 at hotmail.com> wrote:

> 
> 
> I'm not at all sure that I know what burnt clay
> is--do you get it by 
> powdering bricks, buy it as grog from the pottery
> supply, or is it something 
> a bit more specific?  It's supposed to be acting as
> a pozzolan, would 
> fly-ash be a substitute?
> 
> I'm no help here.
> ......................
> Georgie asks about burnt clay:
>     Hello!
>     I am trying to make roman concrete for mortaring
> an urbanite
>     foundation,
>     and am needing some powdered burnt clay. I
> wonder if anyone has ever
>     heard
>     of this, and if so, where to get it? I need it
> for this weekend, so
>     your
>     timely assistance would be appreciated!
>     Georgie
>     [1]www.cobinthepark.ca
> 
> References
> 
>     1. http://www.cobinthepark.ca/
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> 
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