Regarding the "components" of PC. What are thoughts on the appropriate mixture to use in a non-load-bearing (meaning it only has to bear its own weight) application? (see my photo album, on the container house project renderings for what I'm contemplating)
First, proportions. I've seen the following in reading.
40% portland, 60% paper in a towbehind mixer.
25-30% portland and 20-25% sand, 50% paper by volume.
something about perlite, which I'd like to read up on a bit.
etc.
Perhaps it's been answered elsewhere, but what "grade" of sand, or does it matter? sandbox sand? "making concrete" sand? other?
I've seen Judith talk about using fly-ash as a partial substitute for portland. Anyone else have experience with this, and perhaps some pointers on where to get it in bulk (in the several thousand pounds range) here in Central Texas? What proportion of fly-ash to portland and/or other components?
Also, anyone know of a supplier of portland that'll sell THAT in bulk, rather than sellin it in single 94# bags?
It's a big project comin & will get costly very fast if I have to buy that stuff by the bag. 40' x 10' x 4, 34' x 10' x 4, the 2nd floor roof entire, 40' x 34', and first floor "balcony" roof, 34' x 6'. At a MINIMUM of 12" thickness (actually thinkin about 18"), unless my math's wrong that's 4524 (at 12" thickness) or 6784 (at 18" thickness) cuft of PC.
--- In papercreters@yahoogroups.com, "eepjr24" <eepjr24@...> wrote:
> I would go with 25-30% portland and 20-25% sand, 50% paper by volume. If you use perlite, replace sand with it. I would not use wood chips personally unless you tested how they affect shear for your application.
>
> - Ernie
>
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