[Cob] hybrid systems(cobwood)

[joe r dupont]

Dear Phil,
I have a bunch of land in Texas.. West Texas..
I live in NEw Jersey.
Paperpulp,,,, when dried can be very strong and light weight.
I have mixed in "dirt" from excavations and from my stream which
contained a lot of silt.
In both cases the blocks hardened up .. like rocks.
The paper seems to keep things together.
Obiously clay would help cement things together.. But a mixture of paper
pulp and your
dust would be worth a try..

I would use padobe.. paper and dirt.. on the inside walls..  I might even
just use paper pulp
inside. 

I think the clay  on the blocks i made got hard even outside.. as the
rain did not penetrate the clay on the surface of the block... but it
breathed enough to dry during the sunny days.
I will put up an inverted cone roof to bring the water to the center of
the round buildings.
this will minimize the splatter on the outside walls.



On Tue, 11 Nov 2003 11:19:26 +0900 "D.J. Henman" <henman at it.to-be.co.jp>
writes:
> Joseph,
>     What did you use for a binder?   In cob clay is the binder that 
> holds sand, straw, etc., together, but if you just use rock dust, it 
> 
> seems that there would be nothing to hold the block together.   Did 
> you 
> mean that you used clay with the rock dust and pulp?     You didn't 
> mention any ratios about the rock dust and paper pulp either, that 
> might 
> be significant.   I mention this because new rock dust, I believe 
> would 
> act just like sand which has no significatn binding properties and 
> quickly falls apart.    Could you explain a little more about the 
> blocks 
> you made?
> 
> Darel
> 
> ---------------------------------
> 
> Joseph R Dupont wrote:
> 
> >Wow.. that was interesting.. haveyou mixed the rock dust with paper
> >pulp?????
> >I'll have to look into that..
> >I've mixed  shale like dirt with paper pulp and made some very hard
> >blocks.
> >
> >
> >On Mon, 10 Nov 2003 12:14:42 -0500 (EST) "phil" <phawn1 at excite.com>
> >writes:
> >  
> >
> >>I spoke with Rob Roy in July and had a chance to question him on 
> >>cobwood. He said that he didn't really have enough experience with 
> 
> >>cob to be able to comment too much on it. He said that it did look 
> 
> >>promising but that only time would tell.
> >>
> >>We have a coalition member who has begun her cobwood home. She has 
> 
> >>the framing completed and the second story closed in with panels. 
> It 
> >>is too late here to begin cob as we have freezing weather already. 
> 
> >>Come April we'll be ready to have cobwood workshops and everyone 
> can 
> >>learn together.
> >>
> >>Here in the mountains of North Carolina cob and cordwood make the 
> >>most sense. Besides tourism, our only real industries are lumber 
> and 
> >>rock. There are always wood scraps available for free/cheap and I 
> >>have had good success so far using rock dust in the place of sand. 
> 
> >>The price difference alone between rock dust ($9.50 a ton) and 
> sand 
> >>($50.00 a ton) make rock dust the obvious choice as an aggregate 
> in 
> >>cob.
> >>
> >>Phil Hawn
> >>President
> >>The North Carolina Natural Building Coalition
> >>http://naturalbuilder.org
> >>
> >>
> >> --- On Sat 11/08, jenny walker < jwalker at magma.ca > wrote:
> >>From: jenny walker [mailto: jwalker at magma.ca]
> >>To: coblist at deatech.com
> >>Date: Sat, 08 Nov 2003 10:11:04 -0500
> >>Subject: [Cob] hybrid systems
> >>
> >>Hello there, another hybrid system Jilly and others that could be 
> >>done is<br>cordwood. Rob Roy's revised Earthwood  book (Cordwood, 
> >>The State of the Art)<br>has a bit on 'cob-wood', where cob is 
> used 
> >>as the filler between the log<br>ends instead of cement. Ianto 
> Evans 
> >>& Linda Smiley visited his Earthwood<br>Building School and did an 
> 
> >>experimental wall with Jaki and Rob Roy and I<br>believe it turned 
> 
> >>out well.<br><br>See http://www.cordwoodmasonry.com<br><br>Good 
> >>luck,<br><br>Jenny Walker<br>-- 
> >>
> >>    
> >>
>
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