"John M. Joseph" wrote:
>
> While working in North Carolina, I encountered a basement floor which
> consist of approximately 40% calcium carbonate & 60% clay.  The mixture
> was poured over sand and is rock hard.  Does anyone know of any reference
> pertaining to this type of flooring?
>
> Thanks
> John Mark Joseph
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John Mark,

That sounds like the same floor material we found in the "lumberhouse"
building at Rocketts. It was clay and lime laid, in our case, over
angular granite gravel base. That floor was laid about 1850, if I
remember correctly. I think you should have a copy of the Rocketts
report, so take a look.

dan