Logan Oplinger on wed 21 mar 01
Reid Harvey and All,
White cement is essentially the same as regular portland cement, with a much lower content of iron and other metals which cause the darker color of portland. White cement is not a high alumina cement.
I can only suggest adding refractory aggregate and testing. I do not know what the practical limits are for using white cement to construct a kiln, but to say that the highter the temperature, the closer you would approach it functioning as a glaze.
See references in Clayart for Cement based glazes.
The site:
http://www.upd-gr.com/wc_typ_anal.html
gives a typical analysis for white cement, and
http://www.upd-gr.com/gc_typ_anal.html
gives a typical analysis for gray portland cement.
Note the high CaO content >60%, and calcium silicates in both of the above.
Also contact:
http://www.jk-white.com/
JK WHITE CEMENT
TECHNICAL & MANAGEMENT SERVICES DEPT.
221, Ashok Nagar,
UDAIPUR - 313 001
(Rajasthan) INDIA
Tel no. +91-294- (412107 / 414289)
Fax. +91-294- 414181
E-mail mpr@jk-white.com
They may be able to provide you with a typical analysis for white cement.
Logan Oplinger
You wrote...
I have purchased small
> amounts of white cement, made in Japan and Thailand, intending to pop these into an upcoming kiln firing. I'm hoping these will indicate refractoriness, but need a bit of advice.
> Does anyone know what white cement in normally composed of? Also, would it have a longer life if I were to toss in some kind of aggregate, say broken refractory brick? And what effect might water content and curing have?
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