Fire resistance comes when you have enough cement to form an ablative
char- could be done with lime but the you would hold the mother-load
of water - testing shows fire resistance at about 3.5 sacks of cement
per yard of finhed material-Later--- In papercreters@yahoogroups.com,
<janoahsh@...> wrote:
>
> Hi Clyde,
>
> If I'm using it between two thin FC shells strength isn't as much of an
> issue. I'm really looking for fire resistance. How does the lime
adversely
> affect the mix?
>
> I originally thought to use silty sandy clay that is common here and my
> thinking is the slacked lime will react with it to make a cement
like glue.
> Of course I will test it, but would like input that may save me some
hassle.
>
>
>
> _____
>
> From: papercreters@yahoogroups.com
[mailto:papercreters@yahoogroups.com] On
> Behalf Of clydetcurry
> Sent: Sunday, February 03, 2008 5:06 AM
> To: papercreters@yahoogroups.com
> Subject: [papercreters] Re:Mortar
>
>
>
> ---the meta kaolin is manufactured to react with the excess lime from
> the portland -add it at a 15% replacement, by weight of the portland -
> it makes additional cement, and thus strength - it is not designed to
> be used alone - also adding lime would be counter productive as it is
> the lime that causes a problem with the excess water in papercrete -
> by the way the set characteristics of metakaolin nearly exactly match
> those of portland - the usual problem is that people do not use nearly
> enough cement in total ! METAKAOLIN COSTS $11 PER 40 LB. BAG IF BOUGHT
> IN VOLUME ,TWICE AS MUCH A BAG AT A TIME- GOOD LUCK In
> HYPERLINK
> "mailto:papercreters%40yahoogroups.com"papercreters@...,
> "clydetcurry" <clyde@> wrote:
> >
> > Metakaolin pozzalon reacts with the excess lime in portland cement, it
> > makes it into super cement while radically reduceing the problems that
> > papercrete has with holding on to water--- In
> > HYPERLINK
> "mailto:papercreters%40yahoogroups.com"papercreters@...,
> "Janoahsh" <janoahsh@> wrote:
> > >
> > > Thank You,
> > >
> > > That sounds like a really good mix Eli. What I was referring to
> was the
> > > cement mix for the papercrete. Most papercrete is made using
Portland
> > > Cement, but I've heard of others using Metakaolin and Slacked Lime.
> > I am
> > > curious as how the different applications compare. I remember that
> > > Metakaolin increases fire resistance. Is it more or less brittle
> > when dry,
> > > does it retain water to a greater degree? I'm curious if it might
> > be an
> > > alternative to using Portland. I'm ready to begin testing again and
> > thought
> > > to try some clay mixes.
> > >
> > > Janosh
> > >
> > >
> > >
> > > _____
> > >
> > > From: HYPERLINK
> "mailto:papercreters%40yahoogroups.com"papercreters@...
> > [mailto:HYPERLINK
> "mailto:papercreters%40yahoogroups.com"papercreters@...] On
> > > Behalf Of Eli Sutton
> > > Sent: Monday, January 28, 2008 1:14 PM
> > > To: papercreters
> > > Subject: [papercreters] Re:Mortar
> > >
> > >
> > >
> > > I can't speak to pluses and minuses but I can tell you how we make a
> > very
> > > successful mortar for our papercrete block house under
construction.
> > >
> > > It is based on a traditional mortar mix. We make our slurry from
> > newprint to
> > > the consistency of oatmeal with the emulsifier shown in the Photos
> > section.
> > > We wet the blocks before laying up.
> > >
> > > Into a mixer we throw an almost full 5gal bucket of sand, 1qt of
> > lime, 1qt
> > > of Metakaolin, and 6qts of Portland. Mix. Add about 12qt of slurry
> > adding
> > > gradually until the consistency is right. Mix about 7 min.
> > >
> > > I hope this is useful.
> > >
> > > Eli
> > >
> > > BTW check out some pix of the project at
> > > HYPERLINK
>
"http://picasaweb.-google.com/-eli.verdesystems"http://picasaweb.--google.co
> m/--eli.verdesystem-s
>
>
>
>
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> 9:51 AM
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