Zoe Paddy Johnson on fri 22 aug 03
Hi:
My brother has a chunk of concrete from a rebuild of a portion of the
Ventura Freeway. He would like some cups made to give out to clients that
include part of the freeway. Specifically, he was wondering if there was a
way to make the concrete into glaze. I said I doubted that it would work
just by somehow powdering the concrete and painting it on, but I wonder if
it would be possible to take the powdered concrete from some old something
and add like some small percentage, say between 2 and 8 percent to an
existing base glaze? That way one could get a glaze that contains the
freeway.
ZoeJ
Dave Finkelnburg on fri 22 aug 03
Zoe,
Certainly, as you suggest you could add a small percentage of the
concrete powder to a base glaze and still have a good glaze.
If you want to do more, refer to "Ash Glazes" by Tichane or search the
Clayart archives to see if there is mention of fake wood ash glazes using
cement. The cement in concrete is basically calcium oxide, a powerful high
temperature flux. I don't know if ground concrete will make a glaze by
itself, but it might. Assuming the coarse aggregate (sand and gravel) in
the concrete is mostly silica, you might need to add some clay.
This is another case where a Currie grid tile would be very helpful,
using ground concrete as the unknown material you want to investigate.
Good glazing!
Dave Finkelnburg
----- Original Message -----
From: "Zoe Paddy Johnson"
> My brother has a chunk of concrete from a rebuild of a portion of the
> Ventura Freeway. He would like some cups made to give out to clients that
> include part of the freeway. Specifically, he was wondering if there was
a
> way to make the concrete into glaze. I said I doubted that it would work
> just by somehow powdering the concrete and painting it on, but I wonder if
> it would be possible to take the powdered concrete from some old something
> and add like some small percentage, say between 2 and 8 percent to an
> existing base glaze? That way one could get a glaze that contains the
> freeway.
Dapogny.Gail on sun 24 aug 03
Around here there is a glaze which we call simply "cement". It has a dry,
interestingly crusty surface, and takes colorants reasonably well. You
should mix up only what you are going to use because it does not store
well.
CEMENT (cone 9-10)
Cement 25
Ash 25
Kaolin 50
One possibility for dark brown:
Rutile 5%
Manganese diox 3%
---Gail
>Back in the mid 70s Studio Potter did an article on concrete glazes. If
>i remember right it was actually using "cement" not concrete, but the
>results should be similar if the conc was calcined first.
Zoe Paddy Johnson on sun 24 aug 03
Thanks!
I calcined some chips of concrete over the weekend. They break down to a
powder rather easily after firing. The pebbles and gravel that were
included didn't break down at all (The look like they would take glaze
great!), so I will take your glaze and substitute my powdered concrete for
the cement and see what happens.
ZoeJ
--On Sunday, August 24, 2003 11:19 PM -0400 "Dapogny.Gail"
wrote:
> Around here there is a glaze which we call simply "cement". It has a dry,
> interestingly crusty surface, and takes colorants reasonably well. You
> should mix up only what you are going to use because it does not store
> well.
>
> CEMENT (cone 9-10)
>
> Cement 25
> Ash 25
> Kaolin 50
>
> One possibility for dark brown:
> Rutile 5%
> Manganese diox 3%
>
> ---Gail
>
>
>
>
>
>> Back in the mid 70s Studio Potter did an article on concrete glazes. If
>> i remember right it was actually using "cement" not concrete, but the
>> results should be similar if the conc was calcined first.
>
> _________________________________________________________________________
> _____ 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.
Klyf Brown on sun 24 aug 03
Zoe,
Back in the mid 70s Studio Potter did an article on concrete glazes. If
i remember right it was actually using "cement" not concrete, but the
results should be similar if the conc was calcined first. More silica will
be present because of the sand and gravel in concrete. I tried it and it
was a very ugly glossy green. I suppose you could adjust it with metal
oxides, but it was too ugly for me to mess with.
You might go to SPs web site and see if the article is there. it is a
place to start.
Klyf in New Mexico, usa
>include part of the freeway. Specifically, he was wondering if there
was a
>way to make the concrete into glaze. I said I doubted that it would
work
Snail Scott on mon 25 aug 03
> wrote:
>> I am a former student of UNM...............is Jim Jacobs and Lindy Hurist
>> still at UNM??????????????
At 09:35 AM 8/25/03 -0600, you wrote:
> Lindy Hurst is not listed in any section of the UNM
>directory.
Lindy Hirst (note spelling) got her MFA when I was at
UNM in the early 90's sometime. She got a position at
the UMN Valencia campus in Belen after that; haven't
heard from her since then, though.
-Snail
Klevinsky, David on mon 25 aug 03
Zoe,
A question or two not about glazes.
I am a former student of UNM...............is Jim Jacobs and Lindy Hurist
still at UNM??????????????
David Klevinsky
Ilene Mahler on mon 25 aug 03
gail couldn't open e-mail..Ilene
----- Original Message -----
From: "Dapogny.Gail"
To:
Sent: Sunday, August 24, 2003 11:19 PM
Subject: Re: Making Glaze from the Ventura Freeway
> Around here there is a glaze which we call simply "cement". It has a dry,
> interestingly crusty surface, and takes colorants reasonably well. You
> should mix up only what you are going to use because it does not store
> well.
>
> CEMENT (cone 9-10)
>
> Cement 25
> Ash 25
> Kaolin 50
>
> One possibility for dark brown:
> Rutile 5%
> Manganese diox 3%
>
> ---Gail
>
>
>
>
>
> >Back in the mid 70s Studio Potter did an article on concrete glazes. If
> >i remember right it was actually using "cement" not concrete, but the
> >results should be similar if the conc was calcined first.
>
>
____________________________________________________________________________
__
> 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.
Zoe Paddy Johnson on mon 25 aug 03
I am not a student, especially an art student (would love to be someday).
I am a statistician/graphic designer at the computer center, but I looked
up the names and James Jacob is listed as head of the art/art history
graduate program. Lindy Hurst is not listed in any section of the UNM
directory.
ZoeJ
--On Monday, August 25, 2003 8:48 AM -0400 "Klevinsky, David"
wrote:
> Zoe,
> A question or two not about glazes.
> I am a former student of UNM...............is Jim Jacobs and Lindy Hurist
> still at UNM??????????????
> David Klevinsky
>
> _________________________________________________________________________
> _____ 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.
Klevinsky, David on mon 25 aug 03
Zoe,
Thank you for the information.
I am in process of sending out resumes for teaching positions.
I was a fellow student with Jacobs and Hurist a long time ago in New Mexico.
Thank you again
David, former Rugby Coach of the University of New Mexico Atomic Sisters
Rugby Football Club
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