[Cob] hybrid systems(cobwood)

[phil]

The rock dust I'm refering to is a by-product of crushing large rock into gravel. It is dark grey in color (at least it is here) and is anywhere from a fine powder to a course sand in size.

Phil Hawn, President
The North Carolina Natural Building Coalition
http://naturalbuilder.org
cob, strawbale, cordwood and other sustainable earthbuilding techniques

 --- On Tue 11/11, Kim West < kwest at arkansas.net > wrote:
From: Kim West [mailto: kwest at arkansas.net]
To: coblist at deatech.com
Date: Tue, 11 Nov 2003 15:24:41 -0600
Subject: Re: [Cob] hybrid systems(cobwood)

What are you referring to as rock dust? We used two different kinds of<br>"sand" in our cob. The first looked like sand but had sharp little pieces of<br>crushed rock in it. It cut our feet so badly that I had to wrap them in duct<br>tape by the third or fourth day of stomping cob else give up and admit<br>defeat. The second load we got was from the dirt hauler's land and it was<br>all natural--just the way it came from the earth. Never had a prob with it<br>and it seems to have done quite well. Will know for sure once the house is<br>finished next year.<br><br>Kim<br><br><br>----- Original Message ----- <br>From: "phil" <phawn1 at excite.com><br>To: <coblist at deatech.com><br>Sent: Monday, November 10, 2003 11:14 AM<br>Subject: RE: [Cob] hybrid systems(cobwood)<br><br><br>><br>> I spoke with Rob Roy in July and had a chance to question him on cobwood.<br>He said that he didn't really have enough experience with cob to be able to<br>comment too much on it. He said that it did look promising but that only<br>time would tell.<br>><br>> We have a coalition member who has begun her cobwood home. She has the<br>framing completed and the second story closed in with panels. It is too late<br>here to begin cob as we have freezing weather already. Come April we'll be<br>ready to have cobwood workshops and everyone can learn together.<br>><br>> Here in the mountains of North Carolina cob and cordwood make the most<br>sense. Besides tourism, our only real industries are lumber and rock. There<br>are always wood scraps available for free/cheap and I have had good success<br>so far using rock dust in the place of sand. The price difference alone<br>between rock dust ($9.50 a ton) and sand ($50.00 a ton) make rock dust the<br>obvious choice as an aggregate in cob.<br>><br>> Phil Hawn<br>> President<br>> The North Carolina Natural Building Coalition<br>> http://naturalbuilder.org<br>><br>><br>>  --- On Sat 11/08, jenny walker < jwalker at magma.ca > wrote:<br>> From: jenny walker [mailto: jwalker at magma.ca]<br>> To: coblist at deatech.com<br>> Date: Sat, 08 Nov 2003 10:11:04 -0500<br>> Subject: [Cob] hybrid systems<br>><br>> Hello there, another hybrid system Jilly and others that could be done<br>is<br>cordwood. Rob Roy's revised Earthwood  book (Cordwood, The State of<br>the Art)<br>has a bit on 'cob-wood', where cob is used as the filler between<br>the log<br>ends instead of cement. Ianto Evans & Linda Smiley visited his<br>Earthwood<br>Building School and did an experimental wall with Jaki and Rob<br>Roy and I<br>believe it turned out well.<br><br>See<br>http://www.cordwoodmasonry.com<br><br>Good luck,<br><br>Jenny Walker<br>-- <br><br><br><br>_______________________________________________<br>Coblist<br>mailing<br>list<br>Coblist at deatech.com<br>http://www.deatech.com/mailman/listinfo/cobli<br>st<br><br>><br>> _______________________________________________<br>> Join Excite! - http://www.excite.com<br>> The most personalized portal on the Web!<br>><br>> _______________________________________________<br>> Coblist mailing list<br>> Coblist at deatech.com<br>> http://www.deatech.com/mailman/listinfo/coblist<br>><br><br><br>_______________________________________________<br>Coblist mailing list<br>Coblist at deatech.com<br>http://www.deatech.com/mailman/listinfo/coblist<br>

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