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

Monday, February 28, 2011

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

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@yahoo.com> 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.
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> --- On Sat, 2/26/11, eo greensticks <eogreensticks@gmail.com> wrote:
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> From: eo greensticks <eogreensticks@gmail.com>
> Subject: Re: [papercreters] Re: What is it that shrinks in papercrete?
> To: papercreters@yahoogroups.com
> Date: Saturday, February 26, 2011, 10:12 PM
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> fly ash is used in ceramicrete (magnesium concrete) flyash is
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> byproduct from burning coal-here in Tasmania, coal is mined but
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> exported so fly ash (along with rice hull ash) is not available-what
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> about wood ash,would that work? i think magnesium cement would be good
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> in papercretf as the mag cement is keen to bond with fibre where
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> portland apparently actually repels fibre. knowing that, i can't
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> figure why my experiments with paper, sawdust and cloth using portland
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> have worked so well?there is a whole world of concrete chemistry to
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> On 2/26/11, Wayne <huon@intas.net.au> wrote:
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>> Seems a great idea Dan.
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>> Can any sort of ash be used or does it have to be rice hull? Rice is not
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>> grown here but I have access to other organic wastes such as trees.
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>> Wayne
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>>> Check out the following links, for example.
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>>> It seems that rice hull *ash* is usually used as an additive to
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>>> concrete, similar to and possibly better than pozzolan.
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>>> Perhaps you could use both rice hulls and rice hull ash in your mix,
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>>> getting twice the bang for your buck.
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>>> Dan
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