Papercreters: [papercreters] Re: papercrete curing,paint for and magnesium cement...?

Monday, October 25, 2010

[papercreters] Re: papercrete curing,paint for and magnesium cement...?

Thanks for the info, sounds like something I would like to try. I have
been working inmate labor plastering the lower portion of an old brick
wall that has badly erroded. We have been using a mixture:

First off get the liquid up and mixed. Three parts water to one part
scrap latex paint.

Second let the paper pulp soak overnight then blend till creamy like
oatmeal.

Third start the mixture in a 5 gal bucket.

1 gal pulped paper

1 gal drywall compound (premixed)

mix the above ingredients until well blended.

start adding premixed morter mix until the mix becomes too thick to mix
in further, then start adding small amounts ot the water/paint mixture
to bring the mix to a smoother consistency then start adding premixed
morter mix again until the bucket is full, if it is to dry add some more
water/paint mixture.

this can be troweled very smooth with a pool trowel and makes a
wonderful looking wall, but as an added touch we mixed:

2 gallons fine sand blasting sand

1/2 gal paper pulp

1/2 gal drywall compound

1 gal masonary cement

1 gal portland cement

and enough water/paint to make the mixture really wet, this will have to
be poured into two different 5 gal buckets because it makes a little
over six gallons, we sprayed this with a small hopper and got a great
looking orange peel effect over the home made stucco. We belveled the
top edge so rain water could not get behind and we are going to paint as
soon as the mixture looks dry, about 3 or 4 days sould do the trick.

I'll try to post some photos as soon as I can.

Bob

--- In papercreters@yahoogroups.com, "eogreensticks" <eogreensticks@...>
wrote:
>
> i have been doing some experimental concrete work for which the finish
coat is papercrete and so far it looks promising-
>
> the base <bones> is made to any shape using cloth dipped in portland
cement slurry (with bondcrete in)-the cloth can be old clothes cut to
flat pieces if you want to be fancy (natural fibre best)
>
> the cloth is dipped and wrung out then hung on horizontal wires about
6 inches apart attached to wooden uprights (can use ringlock fencing!)
Once the cloth has hardened up enough to carry on,a layer of 'sawcrete'
goes over the bones (i use 3 sawdust-3 sand-1/2 lime putty-1/2 clay
slip-1 portland by volume then 200 ml bondcrete stirred in)
> i paint the surface with porland slurry before putting the sawcrete
on...
>
> once that's hardened up enough,the finish coat of Papercrete, again
painting the surface first with porland slurry (2 paper pulp-3 sand-1/2
lime putty-1/2 clay slip-1 cement by volume then 200 ml bondcrete
stirred in)This 'render coat' can be made very smooth and beautiful with
lots of patting!The sculptural possibilities are intriguing and so far
the basic structure is solid- my questions are:
>
> How long to wait before painting the papercrete:
> -Does it want a 28 day cure like portland does?
> -Would it be better to paint while the papercrete render is still
curing so the paint surface bonds with the papercrete?
>
> -Does anyone have a good recipe for a breathable homemade paint for
the papercrete? I have tried Grout mixed to paint consistency with a
little bit of bondcrete and lime putty- it worked but the grout is a bit
pricey.
>
> -Has anyone tried using Magnesium Cement with papercrete or sawcrete?
> i understand it is keen to form a bipolar bond with cellulose which
portland apparently is not...?
>