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Post by josephcrawley on Nov 20, 2009 11:21:04 GMT -8
I have made some 1/2 clay vermiculite bricks to build my heat riser from. My question is should I fire these bricks before building the stove or not. I was thinking if pit firing them to at least a bisque firing but then again they seem like they will bisque in the burn tube eventually.
thanks
Joseph
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Post by Donkey on Nov 21, 2009 23:11:18 GMT -8
It seems that they bisque in the burn tube.
I don't think they need to be fired at all. I've never done it, and can't really think of an advantage to it. Not to say there wouldn't be an advantage there, just that I'm not seeing one.
These bricks, fired or not, are going to be pretty fragile so I'd suggest (you are probably already on to this) they not be placed where they might get banged by wood or fire tools, etc.
As long as they don't get whacked, they should take just about as much heat as you can throw at them and last a good long time. It makes a difference what kind of clay soil you have. Different clays expand more (or less) than others when heated. It's possible for certain clays to be so expansive as to shove themselves apart no matter how much aggregate you temper it with.. I've never experienced that, though I suppose it's possible.
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