Cob: Plaster finish question

[Taylor Publishing-DirtCheapBuilder]

  I have some beautiful red clay which I would like to add to a very 
white lime plaster for finishing my cob wall.
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Radu--
you're gonna get PINK with that combo..."play" sand is usually not sharp 
sand and makes a poor plaster, BUT if it is sea shells/coral it has a 
pozzolanic reation to clay/lime and may NOT be round after all..use a 
microscope/lookingglass  to see if it is angular or round... you want 
sand shaped like a dog tooth...triangular, so it all locks together as 
it  air carbonates back to limestone.

You may have the best of all worlds in the Carribean sand if it is sharp 
and calciferous.


Ms. Charmaine  Taylor/ Taylor Publishing
PO Box 375, Cutten   CA 95534 707-441-1632    books at dirtcheapbuilder.com
 http://www.dirtcheapbuilder.com    http://www.papercrete.com