|
__._,_.___
Monday, February 28, 2011
RE: [papercreters] Re: What is it that shrinks in papercrete?
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RE: [papercreters] Re: What is it that shrinks in papercrete?
Portland works with paper because it never really has to bond. The cellulose fibers swell and separate when soaked and the portland which has been dissolved in water fills in the voids created by the separated fibers. Water leaches away and the matrix of fibers with portland hardens up. Imagine you are pouring water with portland over your head. Let it dry and you will have a cement helmet on your head even though portland does not bond with hair.
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: Tue, 1 Mar 2011 11:30:51 +1100
Subject: Re: [papercreters] Re: What is it that shrinks in papercrete?
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
>
> 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.
>
>>
>
>>
>
>>
>
>> --- 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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>
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>
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>
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>
>>
>
>> 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@intas.net.au> 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
>
>>
>
>>>
>
>>
>
>>>
>
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>
>>>
>
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>>
>
>
>
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>
>
>
>
>
>
>
>
>
>
>
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?
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> 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.
>
>>
>
>>
>
>>
>
>> --- 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
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>> 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@intas.net.au> 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
>
>>
>
>>>
>
>>
>
>>>
>
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>
>>>
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>
__._,_.___
Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
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__,_._,___
Re: [papercreters] Re: What is it that shrinks in papercrete?
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?
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> 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.
>
>>
>
>>
>
>>
>
>> --- 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
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>>
>
>> 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@intas.net.au> 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
>
>>
>
>>>
>
>>
>
>>>
>
>>
>
>>>
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>
------------------------------------
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[papercreters] Re: What is it that shrinks in papercrete?
Dan
“While it shares some properties of other mineral admixtures, the key to RHA’s effectiveness is its particle surface. RHA’s average particle size is comparable to that of fly ash, and RHA’s silica content and degree of reactivity are comparable to silica fume’s.
“Silica in pozzolans reacts with portland cement paste’s weak and easily soluble calcium hydroxide to form stronger-bonding calcium silicate hydrates. In hardened concrete, more calcium silicate hydrates mean less capillary porosity and less permeability. This pozzolanic reaction also reduces the presence of soluble, alkaline calcium hydrates, which can leach out and weaken concrete.
“RHA used in concrete has an effect similar to other pozzolans. Research indicates a 10% replacement of the weight of cement by RHA produces higher compressive, tensile, and flexural strengths than ordinary concrete but slightly lower strengths than silica fume/cement concrete. “ ftp://66.151.101.167/woc/J970499.PDF
http://lejpt.academicdirect.org/A08/09_16.htm
Characteristics of Wood ASH/OPC Concrete
“Wood ash in this study is an admixture: a pozzolana. A pozzolana is a material rich in silica and alumina which in itself has little or no cementitious value but will, in finely divided form and in the presence of moisture, chemically react with calcium hydroxide at ordinary temperatures to form compounds possessing cementitious properties [3]. Wood ash is obtained from the combustion of wood. It can be related to fly ash since fly ash is obtained from coal, which is a fossilized wood [4]. Rice husk ash is also of plant origin. This implies that wood ash could be used as a pozzolana in concrete. Tarun, Rudolph and Rafat [5] reported the following elements in wood ash: carbon (5% to 30%), calcium (5% to 30%), carbon (7% to 33%), potassium (3% to 4%), magnesium (1% to 2%), phosphorus (0.3% to 1.4%) and sodium (0.2% to 0.5%). The following compound composition limits were also reported: SiO2 (4% to 60%), Al2O3 (5% to 20%), Fe2 O3 (10% to 90%), CaO (2% to 37%), MgO (0.7% to 5%), TiO2 (0% to 1.5%), K2O (0.4% to 14%), SO3 (0.1% to 15%), LOI (0.1% to 33%), moisture content (0.1% to 22%), and available alkalis (0.4% to 20%). The study revealed that all the major compounds present in wood ash are present in fly ash.”
Re: What is it that shrinks in papercrete?
Posted by: "Wayne" huon@intas.net.au casaway67
Fri Feb 25, 2011 5:28 pm (PST)
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
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[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
> >
> >>
> >
> >>
> >
> >>
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
------------------------------------
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RE: [papercreters] Re: What is it that shrinks in papercrete?
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?
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.
>
>
>
> --- 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
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> 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@intas.net.au> 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
>
>>
>
>>
>
>>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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.
>
>
>
> --- 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
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> 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@intas.net.au> 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
>
>>
>
>>
>
>>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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__,_._,___
Re: [papercreters] Re: What is it that shrinks in papercrete?
| It doesnt take much to google more info than one would ever need about CSA cements, its no secret. Here is a brief overview done for the countertop industry.. http://www.concretecountertopinstitute.com/library.item.60/csa-cements-rapid-strength-with-a-low-carbon-footprint.html --- On Mon, 2/28/11, eo greensticks <eogreensticks@gmail.com> wrote:
|
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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.
>
>
>
> --- 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
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> 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@intas.net.au> 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
>
>>
>
>>
>
>>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
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<*> Your email settings:
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<*> To change settings online go to:
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[papercreters] Rice Husk Ash
Dear Wayne,
Rice Husk Ash is special because it almost entirely consists of silica and is a water repellent, in addition to being pozollonic.
Must other orgainc ash come no where close to rice husk ash in terms of silical content.
The closet approximation ( hich is also far way) is Sugar cane Ash ( also called baggase Ash)
AshokRice Husk Ash is special because it almost entirely consists of silica and is a water repellent, in addition to being pozollonic.
Must other orgainc ash come no where close to rice husk ash in terms of silical content.
The closet approximation ( hich is also far way) is Sugar cane Ash ( also called baggase Ash)
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