the attraction of using magnesium concrete in place of portland for me
is: a)lower energy footprint in manufacture and in curing absorbs CO2
from the atmosphere, b.)possibility of greater water and fireproof
papercrete (my land in NE Tasmania is in bushfire and high rainfall
zone) The papercrete i have made seems good so far but the water does
seem to come through in places-i havent determined yet if this is
related to the shape of the structure? i can't understand why, if
portland repels fibre, it works in papercrete? i have done
experimental stuff with sawdust/clay/portland and so far it is also
good tho i wonder if it may fail after a few years?
On 3/1/11, JUDITH WILLIAMS <
williams_judith@hotmail.com> wrote:
>
> Off topic perhaps but I have also live in a male centric culture (northern
> NM macho-Hispanic). I'm not complaining. I do find though that if I go to
> pick up materials or inquire about a product or material that I get
> excellent attention. They seem to think it's amusing to have an over the
> hill woman wanting to know the properties of perlite and such things. In
> fact I quite often go alone even when I have a male volunteer (unless I
> have something really heavy or awkward to load). I find people in general
> and men especially happy to help.
>
> I have not really followed your discussion here and am wondering what your
> motivation is in looking for more things to put in papercrete. Are you
> trying to stretch the cement or make a better product? I tried a few mix
> formulas before I settled on one using things that are cheap, free, and/or
> readily available. Keep up the good work. Everyone has different
> circumstances and anything you find that improves things will help all in
> your area.
>
> They who can give up essential liberty to obtain a little temporary safety,
> deserve neither liberty nor safety.
>
> ~ in Memoirs of the Life and Writings of Benjamin Franklin
>
> Follow progress on the new project at
http://www.papercretebyjudith.com/blog >
> More papercrete info at
http://squidoo.com/papercretebyjudith >
>
>
>
> To:
papercreters@yahoogroups.com > From:
eogreensticks@gmail.com > Date: Mon, 28 Feb 2011 20:43:27 +1100
> Subject: Re: [papercreters] Re: What is it that shrinks in papercrete?
>
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> what does CSA stand for? chemical formula?i wonder if sugar would work
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> 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
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>> purple rapid set bags to be getting CSA's.
>
>> Make sure you pick up some retarder while your there, it can go off quick
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>> without it. A lot of hardy board products are cellulose and CSA blends.
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>> Another brand is Ultimax Cements out of California.
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>
>> --- On Sat, 2/26/11, eo greensticks <
eogreensticks@gmail.com> wrote:
>
>>
>
>> 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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>> 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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>> know...
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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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>>> 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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>>>> 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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