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GSBN:Re[2]: GSBN:Borax fireproofing?



<x-charset koi8-r>Dear Andr&#xE9;,

Borax has 3 class of danger in fomer USSR classification, legal max concentration in working place zone - 2 mg/m3, for kids - 0.2 mg/m3.

Evgeny

-----Original Message-----
From: Andr&#xE9; de Bouter forum@...
To: GSBN GSBN@...
Date: Fri, 09 Feb 2007 12:11:17 +0100
Subject: Re: GSBN:Borax fireproofing?

>
> Evgeny, what aspect of Borax is unhealty?
>
> As for the french dip, I find it very unhealthy for my back (makes the
> bales VERY heavy).
>
> Andr&#xE9; de Bouter
>
>
>
> Lorenzo Robles a &#xE9;crit :
> > Hello Michel, and  everyone else,
> >
> > I would rather go on Evgen Shirokov  position, that is, fireproofing with
> > liquid clay (also called "french dip" by Tom Rijven &amp; his fans!).
> > Well, Borax is a good retardant (retards ignition superficially, on
> > burnable
> > materials like straw, wood or paper), but...
> > But if there is an intense heat source, like a reall fire in the
> > place, it
> > wont be long before fire spreads through, anyway. The huge advantage
> > of clay
> > (beyond the fact it is healthy and unexpensive) is the physical barrier ,
> > stopping circulation of air within the fibers. No air, no fire.
> > This is obvious when we see the fire tests on a sb with clay on it:
> > behing
> > the "earth shell" the fibers have slowly carbonized, but no flame,
> > thus no
> > spreading, has occured.
> > And in most cases sb houses will get a plastering on, so if the first
> > coat
> > is clay, borax salts turn to be unnecessary.
> > Lorenzo
> > ----- Original Message -----
> > From: "Bergeron" m.bergeron@...
> > To: "GSBN" GSBN@...
> > Sent: Wednesday, February 07, 2007 8:37 PM
> > Subject: GSBN:Borax fireproofing?
> >
> >
> > Hello Mark and, hopefully, all the other noble members of this list !
> > (I'm
> > not sure this reply will get to any of you because it's my first
> > ever). If
> > it does, well I also want to say hello to those of you I met at the
> > Ontario
> > conference.
> >
> > I am co-author, with Paul Lazinski, of the book "Serious Straw Bale", in
> > case you happen to know the book. At page 206 of the book we describe the
> > recipe of the boron mix which was given to me by Paul Belanger of Living
> > Design Systems in Alberta, Canada. He has used that mix many times to
> > protect bare bale walls during construction against fire hazards. He has
> > used it particularly over flax straw which, as you may know, is highly
> > flammable due to its high linseed oil content.
> >
> > The mixing is done this way: Two parts of borax are mixed dry with one
> > part
> > of boric acid to near-boiling water, to the point of saturation-when the
> > powdered ingredients do not dilute anymore-and then sprayed, usually
> > with a
> > pressurized garden sprayer. It doesn't take very long to spray an entire
> > structure this way, and it certainly makes everybody feel much safer
> > until a
> > base coat of plaster is applied. A mix of 10 pounds of borax and 5
> > pound of
> > boric acid is normally sufficient to spray a house.
> >
> > If you can't find the basic ingredients you could check with a cellulose
> > fiber manufacturer for they use the same material to coat the fiber
> > mix we
> > use for insulation purposes.
> >
> >
> > Michel Bergeron
> > Designer
> > 6282, de Saint-Vallier
> > Montr&#xE9;al. Qu&#xE9;.
> > H2S 2P5
> > (514) 271-8684
> > m.bergeron@...
> >
> >
> >
> > Le 07/02/07 13:54,   Mark Schueneman   markschu@... a &#xE9;crit :
> >
> >> Greetings All,
> >>
> >> COSBA has been asked to provided some 'fireproofed' bales for seating
> >> at a
> >> childrens event here in Boulder. The city requires they be fireproofed.
> >> They
> >> will actually be spread out in a grassy lawn and present little fire
> >> hazard
> >> but the city is worried about some subversive type igniting them, I
> >> guess.
> >> TLS
> >> has several mentions of Boraxed bales but no mention of mix ratio or
> >> penetration required. Any experience with this by anyone?
> >>
> >> Regards,
> >> Mark Schueneman
> >> Colorado Straw Bale Association
> >> 303-444-6027 hm./of.
> >> 303-591-9841 cell
> >>
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>