Recycled drywall in papercrete will act as a fine aggregate mineral
content. It will not be an active ingredient. Most any material that
increases the fine mineral content of papercrete will improve the fire
performance. In this sense it should act a lot like clay.
The trade off is that increasing this mineral content also decreases
the insulation factor for the papercrete. Nothing comes for free.
What the gypsum will do for the strength is much less clear. The
effect will vary widely depending upon the ratios of other ingredients.
All above statements are opinions based upon extrapolations of my
observations using other ingredients, but I'm confident of the
statements. I haven't used old drywall in any experiements, so I can't
make claims with absolute conviction.
Try it and see for yourself?
--- In papercreters@yahoogroups.com, robert wagner <mr3836@...> wrote:
>
> Thanks Spaceman, just thinking about all the drywall seen in debris
bin and wondering if I could save some landfill space, wasn't sure if
it would help with fire retardant, insulation etc.
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