[Cob] Tires For a Foundation?

[beno]

John Hall wrote:

>
> Beno,
> Why the tyres?
> What's wrong with just the gravel?
> Rubber compresses, and decomposes with time.
> Can't see any advantage.
> John.

Well, I thought the tires would give form: like big flat boulders upon 
which to build.No slippage.
Actually, I read in the archives (after posting) a couple years back 
that apparently this is done...even used in walls!
beno