Hi,
Clay shrinks
when drying and swells when wetting. that why it should be mixed with other
materials. I advise you to read The straw bale house by Steen A.S. Steen B
Bainbridge D ,1994 White River Junction, Vermont, pp182-187. You can find
there some practical notices concerning adobe floor making. Amoung others I
found " European tradition calls for a mix of 5 parts sand to one
part of milky consistency clay slip made from soil that is 50% clay". If
you want I can send the copy of those pages.
Henryk
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