Ceramic board over Thermolite blocks, and fire bricks cut. (Soaked in water and diamond angle grinder cut surprisingly easily.)Hoping for some good weather tomorrow to build sand castle form and get casting.....home made tools at the ready
Announcement
Collapse
No announcement yet.
Record of my 32" Homebrew cast oven, on a brick base - West Midlands, UK
Collapse
X
-
That homemade trowel looks very familiar you can use it to install the vcrete as well.Russell
Google Photo Album [https://photos.google.com/share/AF1Q...JneXVXc3hVNHd3/]
Comment
-
Layer of cling film over paper. Homebrew standard mix with polypropylene fibres and stainless fibres. Went up readily over a couple hours. Used concrete mixer to dry mix large batches and mix up with water for each smaller batch. Forgot rubber gloves under building gloves for first batch..... Won't forget again....lime nasty stuff
in barrow. Curved tool makes smoothing easyLast edited by Nick J C; 06-14-2020, 07:05 AM.
- 3 likes
Comment
-
I suspect 24 hours after casting, firing up would end badly.... Plan to get the insulation on first and give it a few weeks to dry it as per most advice
stainless needles.....only able to find one supplier but good price and service....
https://rockbond.co.uk/products/rock...-steel-fibres/
Comment
-
Thanks for your reply Nick. So you decided to wait before firing? There seems to be various advice about but it looks like the consensus is 1 week to cure then gradually build the firing on a daily basis from 300 upwards? ...and fire it up with the blanket on but not any Vcrete?
I've just found that Victas do the needles as well.
Comment
-
I think it’s better to do the drying fires around a week after applying the vermicrete layer. Why lock in a whole lot of extra water in the insulation layer after you’ve just purged the inner parts of it.Kindled with zeal and fired with passion.
Comment
-
Thanks for your reply David. So the best method might be as follows?- Make the castings (two parts);
- Take out the sand mould after 24 hours (if all appears stable)
- Leave for one week, with maybe a plastic sheet over it if the weather is hot and dry (or in any event?);
- Wrap with the ceramic blanket;
- Apply Vermicrete
- Leave for one week;
- Start a daily firing, starting at 300ͦͦ C and letting it heat/cool gradually, then building a progressive increase in heat over one week.
- Apply the final render/stucco layer.
Also, can a hole be drilled in the oven casting to allow a probe thermometer to be installed or is this asking for trouble?
Comment
-
Originally posted by WoodywWun View PostThanks for your reply David. So the best method might be as follows?- Make the castings (two parts);
- Take out the sand mould after 24 hours (if all appears stable)
- Leave for one week, with maybe a plastic sheet over it if the weather is hot and dry (or in any event?);
- Wrap with the ceramic blanket;
- Apply Vermicrete
- Leave for one week;
- Start a daily firing, starting at 300ͦͦ C and letting it heat/cool gradually, then building a progressive increase in heat over one week.
- Apply the final render/stucco layer.
Also, can a hole be drilled in the oven casting to allow a probe thermometer to be installed or is this asking for trouble?
Kindled with zeal and fired with passion.
- 1 like
Comment
Comment