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[Cob] Burnt clay-FIreclay Kaolindirtcheapbuilder-Charmaine Taylor tms at northcoast.com
Tue Jun 21 09:50:48 PDT 2005
On Jun 21, 2005, at 7:26 AM, Marlin Nissen wrote: >> 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 >> Yes it looks like you want something that will be more pozzolanic... if all else fails try buying "Fire clay-mortar clay" it is purse silica clay and is used for pottery.. it itself is NOT burned, but it is a fine grain Kaoilin clay whch will stick like glue to any lime..and wont swell. I use it all the time to fill out a sandy clay harvested here. It is cheap at a builders supplier.. hardware or sometimes feed store. the bag will say FIRE CLAY or Masons clay- locally L Muddux Co in Sacramento mines it right from the ground,,and it is used by cement guys to add to an OPC mix and plasticize the cement I think. the instuctions on the bag will say add 6 parts clay to 1 part cement, etc sand, to make mortar. they are $3-4 for a 50 # sack. the same ( a bit finer) in a pottery store is 10X the price Kaolin can be mined right from the earth, sifted and sold.. it is all over in Boron CA... I got a bag of pale pink Kaolin un-processed and it acts the same as the grey fire clay. >> Charmaine Taylor Publishing books at dirtcheapbuilder.com PO Box 375 Cutten CA 95534 USA -- 707-441-1632 www.dirtcheapbuilder.com & www.papercrete.com New& Used books: www.biblio.com
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