Papercreters: [papercreters] Re: What is it that shrinks in papercrete?

Monday, February 28, 2011

[papercreters] Re: What is it that shrinks in papercrete?

I googled it and got this answer.

CSA cement (Calcium Sulpho aluminate Cement)
http://www.csacement.com/

Tim

--- In papercreters@yahoogroups.com, eo greensticks <eogreensticks@...> wrote:
>
> what does CSA stand for? chemical formula?i wonder if sugar would work
> as th retarder, as i understand it will for portland and mag cements?
> there is a magnesium cement marketed in th US as Grancrete-here in
> Tasmania we dont always get the same products as other places-the
> Concrete suppliers are a very male- centric mob,I'm not sure they
> quite know what to make of a female inquiring about esoteric concrete
> suppllies-it would be good to know what the specific chemical formula
> is for CSA if possible?
>
> On 2/28/11, shahoma prasad <prahoma@...> wrote:
> > CSA cements are low shrinkage compared to portland and have a lower carbon
> > footprint. Another plus is CSA cements bond really well to organic fibers.
> > They are also shipped around more than mag phos cements. You can even find
> > CSA cements at HD, bagged under the rapid set brand. Youve got to get the
> > purple rapid set bags to be getting CSA's.
> > Make sure you pick up some retarder while your there, it can go off quick
> > without it. A lot of hardy board products are cellulose and CSA blends.
> > Another brand is Ultimax Cements out of California.
> >
> >
> >
> > --- On Sat, 2/26/11, eo greensticks <eogreensticks@...> wrote:
> >
> > From: eo greensticks <eogreensticks@...>
> > Subject: Re: [papercreters] Re: What is it that shrinks in papercrete?
> > To: papercreters@yahoogroups.com
> > Date: Saturday, February 26, 2011, 10:12 PM
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > fly ash is used in ceramicrete (magnesium concrete) flyash is
> >
> > byproduct from burning coal-here in Tasmania, coal is mined but
> >
> > exported so fly ash (along with rice hull ash) is not available-what
> >
> > about wood ash,would that work? i think magnesium cement would be good
> >
> > in papercretf as the mag cement is keen to bond with fibre where
> >
> > portland apparently actually repels fibre. knowing that, i can't
> >
> > figure why my experiments with paper, sawdust and cloth using portland
> >
> > have worked so well?there is a whole world of concrete chemistry to
> >
> > know...
> >
> >
> >
> > On 2/26/11, Wayne <huon@...> wrote:
> >
> >> Seems a great idea Dan.
> >
> >>
> >
> >> Can any sort of ash be used or does it have to be rice hull? Rice is not
> >
> >> grown here but I have access to other organic wastes such as trees.
> >
> >>
> >
> >> Wayne
> >
> >>
> >
> >>
> >
> >>
> >
> >>> Check out the following links, for example.
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> It seems that rice hull *ash* is usually used as an additive to
> >
> >>> concrete, similar to and possibly better than pozzolan.
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> Perhaps you could use both rice hulls and rice hull ash in your mix,
> >
> >>> getting twice the bang for your buck.
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> Dan
> >
> >>
> >
> >>
> >
> >>
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>