Not sure if there is a great point in using rice hulls for making
lightweight concrete instead of paper. The only advantage I see in
using papercrete or "ricecrete" is structure.
It is hard to see that papercrete only a few inches thick would be
that strong but it is.
There are homes in Nebraska over 150 years old and the main support is
the thin coating of straw/mud plaster that seals the straw bales. A
proper wire mesh covered w/ papercrete would be much stronger still.
As far as a commitment to any particular "waste" material it is all
waste and using it keeps it out of the waste stream so I see no reason
to have an emotional attachment to any material.
You said:
" This thing needs to be as cheap and easy to build as possible, any
thoughts would be greatly appreciated."
Using rice as the principle insulation is far cheaper, the labor is
less than half and so is the material. If you were going to build a
walk-in freezer , one that was kept near zero , it might be well worth
the extra cost for the papercrete or "ricecrete" because of the larger
heat sink. If you think about it the way they build freezers is by
sandwiching foam insulation between a thik skin which is exactly what
this method does in principle. Four inches of foam is an r-28 , 12
inches of rice is r-36. With this method the skin is 2 to 4 inches and
adds another 5 to 10 which adds up to at least an r-41 , 21% greater
r-value.
The only way I can think of that might be cheaper is to build a root cellar.
On 6/20/12, Clyde T. Curry <clydetcurry@yahoo.com> wrote:
> If you are serious , call me at !-432-244-9140 cell = My references -
> this site and go to www.evesgarden.org and see my previous work - We can
> report to the work group later - I am in transition and would be available
> at almost no cost- Have a concept development for this - also my e-mail is
> clydetcurry@yahoo.com - this goes for the rest of the group as well - I just
> returned from Abiquiu N.M. where I hope I was a help to Our Friend Judith
> Williams .
>
>
> ________________________________
> From: brightsideatx <farump@gmail.com>
> To: papercreters@yahoogroups.com
> Sent: Friday, June 15, 2012 2:23 AM
> Subject: [papercreters] Walk in cooler
>
>
>
> Howdy!
> I'm designing a new walk in cooler to be built via a workshop format for an
> urban farming non profit here in Austin, TX. I want to keep this thing at
> or below 50F year round but never frozen. It gets up to 110 here some days,
> and can be over 90 every day for six months at a time, sometimes humid,
> sometimes dry, sometimes thunder storms, and freezing maybe ten days a year.
> I started out thinking of using straw bale, but I'm concerned it would rot
> due to constant condensation in the bale wall. Then I thought earthbag, but
> apparently it's not very insulative unless you can fill it with volcanic
> scoria gravel which we do not have here. I'm going for a more eco friendly
> and cheaper option than shed with foam panels, so what do you think, is
> papercrete the thing to use? What is the optimal mix for insulating /
> structural walls?
> Is it feasible to pour a papercrete floor over some gravel and sand bags to
> insulate from the earth as well? Do you think it would be a moldy mess?
> This thing needs to be as cheap and easy to build as possible, any thoughts
> would be greatly appreciated.
> Thanks!
>
>
>
--
Forrest Charnock
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Wednesday, June 20, 2012
Re: [papercreters] Walk in cooler
