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Post by dryland on Jun 4, 2019 12:34:23 GMT -8
Has anyone tried making rammed earth bells for their stoves? Just curious as I am going to be building a second bell for my stove.
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Post by michaelegan on Jun 5, 2019 4:48:22 GMT -8
That's an interesting and creative idea. I think it would work but i'm not sure. The air in a bell is hot and depending on the moisture content of your wood can be very humid. My wood is 15% to 20% moisture and the stack temp is up to 200F; when I stick my hand in the flu (through the T I use to prime start) it is very moist. I don't know enough about rammed earth to know how it would hold up to the humidity so that would be my main question.
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Post by esbjornaneer on Jun 6, 2019 2:54:40 GMT -8
I would think it is going to depend on the clay content in your material and also the potential air gaps within the wall. I have mostly used brick interior wall with clay, ash and sand exterior wall in my bells. One time I made a clay, ash and sand dome to cover the bell. With time the dome disintegrated as I had not 'poured' it all in one go. The different sections still held together, i.e. what I had done the first day was still in one piece and what I had added the next day was in one piece but there was gas movement between the sections. This dome was directly over the heat riser so it was in a very hot position.
Best of luck.
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Post by dryland on Jun 17, 2019 1:52:56 GMT -8
I don’t think there should be any air gaps in in the rammed earth as the earth is rammed pretty hard. Other than that I will have to check out some of your “concerns”.
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Post by esbjornaneer on Jun 17, 2019 22:39:26 GMT -8
Please update us with results including how you solve the closing of the bell at the top, always a tricky point.
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Post by dryland on Jun 18, 2019 18:40:32 GMT -8
I will have too. Too many projects going on at my fish farm and with my heater I have a few different options to go.
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