[TheForge] High temperature cement?

[Daniel Kretchmar]

Greetings,
        Some time ago someone on this list posted a recipe for high
temperature concrete to line my coal forge with.  I have long since
lost the recipe.  Could someone repost it?

I found one online for an oven, but I am not sure this will work.  Suggestions?

http://www.traditionaloven.com/tutorials/concrete.html

Daniel Kretchmar
www.irontreeworks.com