Just a thought but are you not going to lose the main reason pc works so well by compressing it. The interlocking fibers and the way the fibers take coatings (lime, cement, ash and such) wouldn't you be crushing and breaking most of the coating off plus losing the bond? Or are the rice hulls and sawdust acting different with the bonding action?
Ken
--- On Mon, 12/1/08, smt460 <smt460@yahoo.com> wrote:
From: smt460 <smt460@yahoo.com>
Subject: [papercreters] Re: Horizontal Presses vs Vertical
To: papercreters@yahoogroups.com
Date: Monday, December 1, 2008, 7:47 AM
Hi what about using the truck box to press panels,line the bottom
with puck board and devise a way for it to slid out. Clair
-- In papercreters@yahoogroups.com, "Janoahsh" <janoahsh@...>
wrote:
>
> WOW, talk about overkill, a multi stage dump truck ram could
probably
> compress wall panels. And only work a few inches of it.
>
> I like it!
>
> Rice hull fly ash is one of the best pozzelons available and can be
mixed as
> 60 or more % replacement for cement be stronger and more resilient.
>
> The Ferrocement Net discussion group Archives have some information
on wood
> and sawdust cement composites, and I have a few files saved on my
hard
> drives.
>
> It has lots of merit but is another whole field of study not much
different
> than papercrete. Fresh Saw dust and wood chips need to be aged or
leached.
>
> I believe you can use a sand clay soil and rice hull fly ash to
make your
> own cement without Portland but haven't had time to try it yet.
What you
> get from the rice Hull ash is reactive silica's that can combine
with the
> silica's and minerals in your clay soils to form molecular bonds
along with
> water as a catalyst which in the right proportions can form a
useful mortar
> reinforced with wood fibers. Strength, insulation, fire
resistance, and
> other characteristics vary by constituent percentages.
>
> Pure pozzelon reactions are much slower than Portland cement
reactions but
> can be ultimately stronger.
>
>
>
>
>
> _____
>
> From: papercreters@yahoogroups.com
[mailto:papercreters@yahoogroups.com] On
> Behalf Of peddler8111
> Sent: Sunday, November 30, 2008 9:48 PM
> To: papercreters@yahoogroups.com
> Subject: [papercreters] Horizontal Presses vs Vertical
>
>
>
> From my understanding the advantage of a horizontal press is it
> compresses from the edge of the block and therefore gives a
consistent
> thickness so dry stacking is possible. Does anyone know why a
vertical
> press could not do the same thing? I could build it horizontally
but I
> don't see why I need to as long as the molds and the piston are
> designed to guarantee consitent thickness by compressing from the
> edge or the end of the block..
> I am trying to engineer a small hydraulic or air over hydraulic
press.
> If I get serious about a big high production press I was thinking
> about rebuilding the hydraulic pump and cylinder from an old Chevy
> dump truck
> to use. The power would be great enough to compress a half a dozen
> blocks at one time or one huge one. I was thinking that I could
could
> make the big blocks to sell the states for temporary road
construction
> barriers.
> What they use now is concrete or plastic barriers {filled w/water}
> which are certainly not real green and I have easy access to paper
and
> a hammer mill, sawdust wood chips,, fly ash and rice hulls and could
> make them 1/2 the weight of the concrete and a whole lot more
giving
> in case of impact than the concrete.
>
>
>
> No virus found in this incoming message.
> Checked by AVG - http://www.avg.com
> Version: 8.0.176 / Virus Database: 270.9.11/1820 - Release Date:
11/29/2008
> 6:52 PM
>
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