Papercreters: [papercreters] Re: Roman Concrete

Friday, September 10, 2010

[papercreters] Re: Roman Concrete

Paper pulp without additives has 2 big problems. First it turns to mush when wet, 2nd it has no rot/mould resistance.

Magnesium oxide is used in warzones & major disasters where a very fast result is needed. Someone makes large cloth tents coated with the powder, just erect the tent and spray with water for a cured building the same day.

--- In papercreters@yahoogroups.com, Perry Way <perryway@...> wrote:
>
> Perhaps a trip over to wikipedia is in order:
> http://en.wikipedia.org/wiki/Roman_concrete
>
> The lead ingredients are: gypsum (ah ha, this is why I got triggered on
> this topic from earlier post today), lime and volcanic dust/ash. It can be
> mixed just like regular concrete. My memory is whoever provided the little
> writeup on this concept suggested that the paper fibers themselves would be
> transformed to ROCK in the process by adding cellulose and/or carbon.
>
> :)
>
> Don't know anything about the magnesium oxide cement though. What you
> shared though sounds like similar traits to Roman Concrete.
>
> What I was thinking is, doing Spaceman's idea of spraying wetted paperpulp
> (only pulp) on shipping containers to provide insulation. Think of this
> like paper mache. Then once my shipping container (or RV trailer or
> whatever cheep object I can obtain like a Greyhound bus perhaps) is feeling
> nice on the inside in hot weather, I'm ready to apply the final touch, the
> hardening coat on the exterior. Thinking of Roman Cement for the strength
> factor and for the water barrier because when I'm done I'd like to cover
> this building with dirt.
>
>
> On Wed, Sep 8, 2010 at 4:28 PM, stick0boy <stick0boy@...> wrote:
>
> >
> >
> >
> > do you mean magniesium oxide cement? i was looking at it and although its
> > stronger, takes less energy to produce, and asorbs co2 it is ~ 3 times as
> > much if you can get it ... but you can build things thin. i saw a few roof
> > that are a fabric with a MO/phosphorus applyed . they built a house in one
> > day and was completely cured in 1 hour and ready to move in the next day. it
> > has a affinity for cellouse it bonds/saturates rather than coats the
> > exterior to make a grid so to speak.. there is a better way to discribe it
> > but idk..
> > in short as far as papercrete i dont think it will be as good unless you
> > can mix it. if you wanted a very strong say 2 inch wall with wood
> > chips/straw/ or saw dust agrigate sounds good