Ken and list,
portland cement is not the best for refractory concretes. High alumina
cements are best. One example is known as Cement Fondue, available in
the UK from South Western Industrial Plasters. Sculptors like it as you
can get a quick set. ( it got a bad name some while back as builders
used it to take short cuts with structural elements)
I have a very good set of info from Lefarge on using this and other
high alumina cements. Get in touch if you are interested.
Regards
Paul Stubbs
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