Hank Murrow on fri 6 dec 02
On Friday, December 6, 2002, at 08:18 PM, mel jacobson wrote:
>
> some of the manufacturers are now recommending
> adding small stainless steel pins to the
> mix, they come packaged by the pound.
> thousands to a batch. the pins add tremendous strength
> to the final cast product. not expensive, just an add on.
> it is sorta like ferro concrete...you know, metal rods, re rod
> in the mix. the pins are obviously not affected by the heat.
> so, they work real well.
Mel; Those wires in the mix are like ripstop nylon in their
effect.......they prevent cracks from travelling.
>
I use them in the floor of my Doorless fiberkiln to good effect. The
crimped ones are the best. They come in several grades too.
Cheers, Hank in Eugene
mel jacobson on fri 6 dec 02
kurt has been the castable expert at the farm
but, he is off clayart now, and having a bad time
with a broken leg....so:
some of the manufacturers are now recommending
adding small stainless steel pins to the
mix, they come packaged by the pound.
thousands to a batch. the pins add tremendous strength
to the final cast product. not expensive, just an add on.
it is sorta like ferro concrete...you know, metal rods, re rod
in the mix. the pins are obviously not affected by the heat.
so, they work real well.
cement folks are adding fibre glass strands to cement now.
adds strength. same idea. pins, strands, re rod. all the
same idea.
something new, all the time.
mel
kurt used the cast material for the roof of the bourry box
on our wood kiln. also cast three beams that cover the
pot chamber. not a crack in the bunch. nice cast job.
of course, he followed the instructions to a T.
From:
Minnetonka, Minnesota, U.S.A.
web site: my.pclink.com/~melpots
or try: http://www.pclink.com/melpots
Matt MacIntire on sat 7 dec 02
Hank or Mel
The stainless steel wires sound like an excellent idea. I had never
heard of them before. =20
Can you identify a manufacturer (or two) for us?
Thanks
Matt
in Maryland
Roger Korn on sat 7 dec 02
Hi Mel,
mel jacobson wrote:
> ...some of the manufacturers are now recommending
> adding small stainless steel pins to the
> mix...
Which ones?
> ...they come packaged by the pound.
Where do I get 'em?
Down at Arkysanto (Rimrock, AZ), I'm messing with a home-made mix of
local kaolin, local fire-clay, Portland cement, and Perlite as a
local-sourced, insulating castable. The first experiment is a small
cross-draft gas/wood kiln with local red pumice as back-up insulation.
Couple of places, I could use some small amount of tensile strength in
the castable and the pin mix might work.
Many thanks, and the Season's best to you and the Minnesota Mafia,
Roger, up in OR 'til the end of the year, then back to AZ.
>
> something new, all the time.
> mel
> kurt used the cast material for the roof of the bourry box
> on our wood kiln. also cast three beams that cover the
> pot chamber. not a crack in the bunch. nice cast job.
> of course, he followed the instructions to a T.
> From:
> Minnetonka, Minnesota, U.S.A.
> web site: my.pclink.com/~melpots
> or try: http://www.pclink.com/melpots
>
> ______________________________________________________________________________
>
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
>
--
Roger Korn
McKay Creek Ceramics
In AZ: PO Box 463
4215 Culpepper Ranch Rd
Rimrock, AZ 86335
928-567-5699 <-
In OR: PO Box 436
31330 NW Pacific Ave.
North Plains, OR 97133
503-647-5464
Paul Herman on sat 7 dec 02
Roger,
Are you using your castable for a hot face?
I use a mix made from diatomaceous earth and fireclay. It seems to be
working as a hot face at ^11.
good firing,
Paul Herman
Great Basin Pottery
423-725 Scott Road
Doyle, California 96109 US
potter@psln.com
----------
>From: Roger Korn
> Down at Arkysanto (Rimrock, AZ), I'm messing with a home-made mix of
> local kaolin, local fire-clay, Portland cement, and Perlite as a
> local-sourced, insulating castable.
Roger Korn on sun 8 dec 02
Hi Paul,
I'm building a 24 cf catenary arch in sections about 12 x 18 inches, 8
in thick, keyed together (think tongue and groove) and buried in red
pumice for back-up insulation. The castable comes in at 75 lb/ cu ft and
the pumice is about 40 lb/cu/ft. The hot face is ITC100HT sprayed thinly
over the castable. I hope this will be long-term stable, but only
testing will show. If it is successful, this system will form the basis
of a three-chamber noborigama.
Best wishes,
Roger
Paul Herman wrote:
>Roger,
>
>Are you using your castable for a hot face?
>
>I use a mix made from diatomaceous earth and fireclay. It seems to be
>working as a hot face at ^11.
>
>good firing,
>
>Paul Herman
>Great Basin Pottery
>423-725 Scott Road
>Doyle, California 96109 US
>potter@psln.com
>
>----------
>
>>From: Roger Korn
>>
>
>>Down at Arkysanto (Rimrock, AZ), I'm messing with a home-made mix of
>>local kaolin, local fire-clay, Portland cement, and Perlite as a
>>local-sourced, insulating castable.
>>
>
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
>
--
Roger Korn
McKay Creek Ceramics
In AZ: PO Box 463
4215 Culpepper Ranch Rd
Rimrock, AZ 86335
928-567-5699 <-
In OR: PO Box 436
31330 NW Pacific Ave.
North Plains, OR 97133
503-647-5464
Hank Murrow on mon 6 jan 03
On Saturday, December 7, 2002, at 08:54 AM, Matt MacIntire wrote:
> Hank or Mel
>
> The stainless steel wires sound like an excellent idea. I had never
> heard of them before.
>
> Can you identify a manufacturer (or two) for us?
>
Dear Matt;
The wire I use in my castable is called Rib-Tec, and is marketed by
Pryor-Giggey, coming in 304 and 310 alloys. It is also 3/4" and 1" in
length. I use the 304 alloy in the 1" length. @ about $3 per pound of
wire. I use it at around 2-4% by dry weight of castable. The principal
castable I use is Phlocast 30S. Which is a High alumina castable
re-inforced by an addition of around 12% Silicon-Carbide grains. Good
for salt kilns. I also use Cerlite 75, a bubble Alumina castable where
insulating qualities are desired. I cast burner ports, lintels, firebox
grates, dampers & the plates they ride on, floors, and other parts as
needed. If the mold is glass-smooth, the castable will be glass-smooth,
Making the molds is time consuming, but within any competent potter's
skills, and the results are well worth the effort. For example: burner
ports may be cast identically from the same mold, insuring that
dimensions and shape are accurate for the critical job of controlling
secondary air. You can even cast in a place for a pilot. I use Barber
pilot burners on my kilns, which stay lit even in gusty weather. Peace
of mind without electronic valves, etc. Call C.H.Murphy in Portland, OR
@ 503-285-5030 and ask for Michael, if you want to pursue this.
Pryor-Gigge itself has a $250 minimum for factory orders, while Murphy
does not.
I hope this belated info is still useful to you, Hank in Eugene
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