RE: [papercreters] Re: Pouring exact forms

I also found it was important to use something to reinforce the block so it doesn't break in the middle when you pick it up. I used some old pieces of wire fencing and some chicken wire. These old panel I've had around for a long time are still in one piece but are very "flexible" meaning that they are very droopy in the middle when lifted. I am going to put them on top of the roof I already have up there so tensile strength is not very important.



Follow progress on the new project at http://www.papercretebyjudith.com/blog

More papercrete info at http://squidoo.com/papercretebyjudith

---

To: papercreters@yahoogroups.com
From: Spaceman@starship-enterprises.net
Date: Sat, 4 Feb 2012 20:36:24 -0700
Subject: Re: [papercreters] Re: Pouring exact forms

 

I did some no cement papercrete, or more accurately just paper panels, and some sprayed infill. If you use just paper, you really need to seal it with a good fireproofing material, because if it ever ignites it will smolder, glow, and turn to ash until it is all gone. It does not have a flame, just smoke and lots of monoxide. I managed to ignite some once with a welder, and had to flood the wall several times with a hose to finally put it out. Lesson learned - don't weld on a frame encased in paper. 

There is some debate on whether compressed papercrete has less insulative value than non-compressed pc. Our beloved founder, Slurry Guy did some experiments with molded pc containers, melting ice, thermometers (and probably some beer) that indicated that compressed pc has higher R factor. It is counter intuitive to me, and I can see several things that might skew the results like wet pc losing its insulating value. However, he's not around lately so we can discuss his results.

spaceman

On 2/4/2012 6:46 PM, prrr.t21@btinternet.com wrote:

The way I completely eliminated shrinking was to fill the mould, then insert a plug, and stand on it until it was pressed down level with the mould's edges. Such compressed blocks can be demoulded immediately and dont shrink. The only issue is that a large block like yours would take numerous people to press it down. I did this with medium and high cement mixes btw, I expect it would work with less cement too, since the cement has no control over dimensions until it begins to set.  More cement does mean a bit less trapped air, and a bit less insulation, but also less spread of fire and more strength.   NT    --- In papercreters@yahoogroups.com, "trendawareness" <trendlinesystems@...> wrote: 

 Thanks for the suggestion.  I don't want them to be too heavy as their primary purpose is insulation.  My understanding is the harder the mix, the less insulative qualities it has.  

__._,_.___

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___