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Post by mintcake on Apr 21, 2014 12:27:39 GMT -8
Hi! Well, I don't know what to say... Many of my firings can last for hours, maybe is it a reason for failures/shrinkage? It might be the length of time... I've never had a burn last that long, but like I say, my test firebox still seems entirely fine, that's walls, floor and roof. I wonder if it's a case of different factories using different mixes, or I just got an unusually good batch for my first trials... My failed piece was almost certainly from a different batch.. Was yours the 5x20x60 "ytong design"? I've seen they do different grades. I also wonder if it's storage conditions... Maybe some got damp and the others didn't or something like that? |
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Post by pyrophile on Apr 27, 2014 10:35:10 GMT -8
Well, I can't be sure it was actually "Ytong" trademark. But during differents "tests", I suppose I used "Ytong".
It would be interesting to be sure on the ability of Ytong to handle big heat!
Perhaps we could decide all together of a common way to test Ytong under heat and this test could be done by a few of us?
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Post by mintcake on Apr 29, 2014 9:38:45 GMT -8
Perhaps we could decide all together of a common way to test Ytong under heat and this test could be done by a few of us? That would be great. Over the weekend, I took out 2/3 of the bottom of my firebox, (I thought I'd try a grate... not with much success.) But what I found is that the ytong had been visibly affected about 2cm into the 5cm thick block. There was a slight change in colour and some cracking. It may just be that my firebox isn't suffering because my test-firings are short and the heat never gets all the way through. Another posibility that occurrs to me is that the test stove is built straight on the outside soil. It could possibly be that a small amount of dampness from the ground is somehow protecting the firebox from reaching high temperatures. There's been some rain over the past weeks and with only time for one or 2 firings a week it seems quite possible that a damp layer rebuilds after each firing. The stove itself is under a plastic sheet, but rest of the garden isn't. The soil under it was certainly not bone-dry. That seems far less likely for the top though. |
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Post by pyrophile on Apr 30, 2014 10:16:59 GMT -8
Could you say how much time do last your tests?
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Post by mintcake on May 3, 2014 12:30:35 GMT -8
hey, I answered this! Wonder what happened.
Tests are typically 3kg of wood (pine) in 2 batches. I'm not sure how long it burns, maybe twenty minutes at "firebox full of flame." stage. I know I've got a rubbish chimney on my test setup (it barely gets above the top of the bell), so since in the real installation it'll have a good chimney I'm testing a worst-case scenario as far as smoke-back is concerned. This probably hurts my fire temperatures quite a bit though.
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Post by pyrophile on May 5, 2014 12:11:34 GMT -8
Excuse me, I have read too fast, sorry!
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Post by dimitrisgr on Jan 6, 2015 5:31:57 GMT -8
So anyone used AND TESTED sodiul silicate coated YTONG?
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