Thanks for setting that straight Carl.
That certainly helps explain some of my confusion.
--- In papercreters@yahoogroups.com, Carl D Cravens <raven@...> wrote:
>
> slurryguy wrote:
> > Polyvinal alcohol doesn't handle moisture well at all.
>
> Note that PVA glue is polyvinyl acetate. Apparently it can be made
> water-resistant with additives, but basic PVA glue (Elmers Glue-
All) isn't.
>
> It's worth noting that PVA reacts with Borax (forms a viscoelastic
> liquid, whatever that means), so mixing both into a PC batch could
have
> very unexpected effects. (Sounds to me like it's likely to gum up
the
> mixer. Ah... polyvinyl alcohol mixed with borax makes "silly
putty"...
> yeah, I'd say it gums up the mixer. :)
>
> > It seems it would also breakdown in the moisture rich environment
of
> > papercrete slurry too. It might bond dry papercrete together,
but when
> > papercrete slurry is available as a mortar, why bother?
>
> Thinned-down PVA glue is used to make papier-mache. I wouldn't
worry
> about it breaking down in a water mix. Don't know what it does
when you
> mix it with cement, though.
>
> But I agree on the latter... if you're just looking to bond PC
bricks
> together, PVA is a poor gap-filler and way more expensive than
using PC
> itself. PC itself seems ideal for this job.
>
> And as far as sealing, might as well use a product meant for
sealing and
> know what you're getting.
>
> --
> Carl D Cravens (raven@...)
> REALITY.SYS Corrupted: Re-boot universe? (Y/N/Q)
>
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