[Cob] Free Bentonite in Seattle and SWIR clay anaysis

[jwellman at jwgeo.com]

   Hi everyone,
   I am including a link to a method to identify clays, called SWIR
   (Short Wave Infrared) that uses an analysis tool call the "PIMA".
   [1]http://www.pimausa.com/clay_min.htm
   It includes some rather in-depth discussion of the various clay
   species.  I do not know what pimausa would charge to analyze a few
   samples for your project, but I would highly recommend it.  Different
   clay species have different properties, some of significance for any
   sort of construction application like COB.
   I have taken a course on the use of PIMA, and have used it.  It looks
   a little like a flashlight with a pistol handle and wires to a
   computer.  The user holds the 'end' about 1 cm away from the material,
   and holds the trigger for about 10 seconds or so, until the device
   indicates it has recorded a reading.
   Good luck in all of your projects.
   On a different note, what ideas have people considered for
   exterior-to-COB insulation?
   Cheers,
   Jesse D. Wellman
   Economic Geologist
   GIS Analyst

   Reno, Nevada

     ------------------------------
     Message: 2
     Date: Fri, 21 Dec 2007 10:13:43 -0800
     From: "Dulane" <[2]silkworm at spiderhollow.com>
     Subject: [Cob] Bentonite Clay in Seattle Again
     To: "Cob" <[3]coblist at deatech.com>
     Message-ID: <00c701c843fd$394550d0$0301a8c0 at cerviche>
     Content-Type: text/plain; charset="iso-8859-1"
     If anyone is even moderately intersted, this is good clay for
     plastering and
     other projects. Maybe a cob oven?
     I know I went on about this two weeks ago, but I went down and
     picked up a
     nice dry 50 lb bag and it was still wrapped in plastic on the
     pallet.
     The company used it in well drilling...so it isn't the highest
     grade stuff
     (food grade), but it is regular bentonite. I think they were
     getting low on
     the 50 lb bags, but they had lots of 100 lb bags.
     Available in Seattle, WA:
     BAGS OF BENTONITE CLAY AVAILABLE. FREE. APPROX 200 50-LB BAGS.
     APPROX 1800
     100-LB BAGS. PICK UP AT MACMILLAN-PIPER, 150 S. HORTON ST.,
     SEATTLE, WA
     98134. SEE BRIAN OR TAMI. PHONE 206-340-2851.
     PS - Thanks for all the nice comments about my little project.
     ------------------------------
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     End of Coblist Digest, Vol 5, Issue 186
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References

   1. http://www.pimausa.com/clay_min.htm
   2. http://email.secureserver.net/pcompose.php#Compose
   3. http://email.secureserver.net/pcompose.php#Compose
   4. http://email.secureserver.net/pcompose.php#Compose
   5. http://www.deatech.com/mailman/listinfo/coblist