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Post by nk14zp on Apr 20, 2012 12:24:13 GMT -8
Made four test pucks today.
1. All clay.
2. One part clay one part ash.
3. One part clay one part sawdust.
4. two parts clay one part ash one part sawdust.
The clay was a clay slip about the same as pudding.
Now the hardest part waiting for them to dry.
I will keep this updated as i get results.
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Post by Donkey on Apr 20, 2012 16:46:31 GMT -8
Depending on your clay, I think you'll need more (of everything else) in the mix. I'd go heavy on the ash and use sawdust for body..
Won't know till these dry.. You can set 'em next to a woodstove (not on it) or in a window to speed up drying time, good airflow helps too..
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Post by nk14zp on Apr 21, 2012 7:59:10 GMT -8
OK, different soil was the answer. Apparently I did not dig deep enough and was originally still using top soil. A bit deeper and I had very clayey subsoil. Mixed it in your suggested 1:1 ratio with ash and finished off the top of my heat riser with it. Now I'll give it a couple of weeks to dry and then fire it up and see how it works. The above post is why I started at 1 to 1 ratios. |
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Post by nk14zp on Apr 21, 2012 12:23:40 GMT -8
I should add that this mix will be used to make a burn tunnel like matthewwalker did for his house. I also plan on adding fiberglass like he did in his cobposite. I hope he doesn't mind me stealing his ideas.
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Post by Donkey on Apr 21, 2012 18:03:19 GMT -8
I hope he doesn't mind me stealing his ideas. Well.. What ELSE would this place be for if we can't rip each other blind?? Otherwise, why tell? God, I love open source.  |
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Post by matthewwalker on Apr 22, 2012 8:52:33 GMT -8
Geez, if it wasn't for ripping ideas, I'd still be in front of that metal box trying to stay warm. I've incorporated so many of Donkey's ideas into my stoves I probably owe him my first born at this point.
Speaking of, I redid my burn tunnel in the outside cooker yesterday. I completely blocked the tunnel with a pile of bricks so the flame path is a "C" out around the bricks, forcing the flame to rush along the window. Works great, looks amazing, keeps the window clean, and throws a ton of heat at your feet. Less heat to the bench, but enough at the grill to cook still. Neat.
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Post by nk14zp on Apr 22, 2012 9:23:12 GMT -8
My plans are to make a plug out of wood to form the burn tunnel with a trip wire in the top of the tunnel. Then make my mix thick and put it on the plug like cob and maybe wrap it with fiberglass tape in the high stress areas. This is after I find the right mix.
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Post by nk14zp on Apr 22, 2012 9:26:08 GMT -8
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Post by Donkey on Apr 22, 2012 14:03:49 GMT -8
My plans are to make a plug out of wood to form the burn tunnel with a trip wire in the top of the tunnel. Then make my mix thick and put it on the plug like cob and maybe wrap it with fiberglass tape in the high stress areas. This is after I find the right mix. How d'ya plan to get the wood out? If yer burning it out that's one thing.. I've learned that wood (unless it's coated with something) sticks REALLY well to most things.  |
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Post by nk14zp on Apr 22, 2012 14:55:41 GMT -8
My plan is to use boards I will make at about 1/8th to 3/16th of an inch thick and burn them out.
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