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The Work of Art and The Art of Work Kiko Denzer on Art |
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[Cob] fire brick?Amanda Peck ap615 at hotmail.comWed Jun 1 11:34:44 CDT 2005
My mother had done a fair amount of pottery in art classes, and all she ever told me was that fire brick stayed intact longer than regular brick in high heat situations. I can see where both arguments could be made of the same brick--blowing hot and cold with the same breath. A layer of fire brick is a lot thinner than a layer of standard brick, so heat would pass through it to the underlying layers faster. On the other hand there ain't no holes in it, so given the same thickness, it might retain heat longer. Given that we have (at least) three hands here, on the third hand, might it be less dense than regular brick? Doesn't help much to know what to do with your curved fire brick. I wonder what that was originally intended for? Is it curved in one plane as in a vault or a circle, or in two, as in a dome? (my all-time favorite Charles Addams cartoon involves a harrassed wife juggling the baby and trying to fix dinner for her tattooed husband in the carney caravan, crying "I've only got three hands!") Here's a link talking about using firebrick in ovens (cob would work instead of concrete, but....: http://www.traditionaloven.com/ "Wood ovens, particularly ovens made using firebricks, have domes that are only about 4 inches thick (10 cm). If well insulated on outside, then this is perfectly satisfactory for pizza and then short time baking. But once you decide to build your own wood burning oven and after pizza do long time baking or large meats slow roasting, consider making the walls up to 6 inches (15 cm) thick by adding on 2 inches concrete cladding layer, such brick ovens will stay hot enough to cook for at least 6 hours using the heat energy generated at pizza making time (it's a worthy project and heaps of fun). Your oven will be a lot more efficient and stronger. You may need to heat it up a little longer, but those 20 minutes and a few bucks extra for concrete gravel etc. will pay you well off and you will be more happy in the end." Not what I was looking for, what I had been looking for was a firebrick oven kit, made with curved bricks. But the site might be remarkably useful. .................. Cat here I have been given conflicting responses to the use of fire brick in bread ovens? A potter tells me that they will keep the oven hotter longer giving a longer baking time, and a slower cooling surface. She told me that the oven will be relesing heat into the room two days after fire. Much like a masonary or Russian stove. A brick mason told me that fire brick is made to pass heat quickly to the surface and protect the interior of the stove from damage??? This is to get heat into the room faster and less heat in the fire box. I just got a few boxes of curved fire brick at a scavanger sale. I must decide where to use them. The bread oven or the heating stove. Ok so I got to figure that their are two kinds of fire brick? Or their is something that I'm not understanding about fire brick. Most use I have seen it is layed loose into the stove and can be repalced. Anyone been up this ally got any suggestions? for the good of all C. _______________________________________________ Coblist mailing list Coblist at deatech.com http://www.deatech.com/mailman/listinfo/coblist
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