Who knows what is in drywall mud? Good ? Proprietary , yet mostly gypsum. Gypsum retains moisture, the enemy of papercrete. It is used to control set in Portland mixtures. Why is moisture such a problem with surface plaster, because the more moisture the more shrinkage, and thus more cracks and delamination. The game seems to be to introduce elements into the mix which control shrinkage. Paper is only of so much value, such as introducing a phenomenal amount of air space and a minimal amount of fibrous reinforcement. Beyond that this is as much a game of particle physics as it is of cementatious adhesion. Composite technology, if you will. So where from here? Perhaps additional stiff fiber, macro-aggregate,as in where is the large aggregate we find in concrete. For a while I employed reground styrofoam for this purpose. It worked well to extend the mix, lessen cost, still it was weak. How about the rice hulls mentioned earlier? Still it is all about filling out the composite to m cost, and improve Physicals . Often what wins out is what is available locally, still it matters what you stick in your mix. Please, let's here more from the others, as to, who has stuck what in what- Clydetcurry@yahoo.com |
From: Emiro Rojas <emirojas@sbcglobal.net>;
To: <papercreters@yahoogroups.com>;
Subject: Re: [papercreters] refinishing a papercrete wall
Sent: Fri, Jun 22, 2012 8:28:05 PM
| What is exactly a "Joint Compound" ? TKS Emiro A. Rojas From: T Phillips <doglover1918@gmail.com> To: papercreters@yahoogroups.com Sent: Fri, June 22, 2012 11:30:21 AM Subject: Re: [papercreters] refinishing a papercrete wall Love your garden work, FML. Thanks for telling us about the success of the different mixtures. I frequently get more out of the ones where things didn't work so well or as expected. On Fri, Jun 22, 2012 at 10:18 AM, F. <fml@pbtcomm.net> wrote:
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