For anyone wondering, the reason his mold sticks is because you need to SOAK it first, and use a wetter clay mixture as well. When the wood is saturated wet it will pull cleanly off the brick. Also will give you a smoother finish when you screed the top!
Geniously simple the sawdust bit. I've used various things like coal particles that partially burn off and what remains graphitizes into the clay, or gas developing additives to help mixes with sodium silicate kick off, but never even thought to try sawdust. It's going on the list for the next batch! 👌
A good project it will be interesting to see how robust the tiles are in use. I may have a go for my Wood burner are they are herendousely expensive. I just need to convert your measurements into proper units. 🤣
I want to make these for a pizza oven floor, what kind of clay was that did you dig it from the ground or did you buy it? Also what type of wood saw dust pine or hardwood? Thanks hope it's still holding up. 😀
Hi the saw dust was just from where I was processing firewood with a circular saw so a mixture of species. The clay was dug from 2 feet down in the meadow and processed to remove the large lumps, see one of my other videos about this (wild clay processing) under the ceramics playlist, subscribed? cheers
Just keep the molds in a bucket of water.. and lightly dust the inside with sand prior to placing the clay inside it.. look up james Townsend fire brick
The first few minutes of this video is a static shot of things just sitting there. You are supposed to do a show and tell when making a video. You didn't show what was being described.
Are you a troll? the video starts talking about firebricks within the first 50 seconds, before that it gives some background. This is not a youtube short designed for short attention spans, so an intro is quite acceptable. Hope all is good in your world, cheers
For anyone wondering, the reason his mold sticks is because you need to SOAK it first, and use a wetter clay mixture as well. When the wood is saturated wet it will pull cleanly off the brick. Also will give you a smoother finish when you screed the top!
Geniously simple the sawdust bit. I've used various things like coal particles that partially burn off and what remains graphitizes into the clay, or gas developing additives to help mixes with sodium silicate kick off, but never even thought to try sawdust. It's going on the list for the next batch! 👌
Hi, I use these as part of the kiln lid, going up to 900 degrees C, seem to work well, cheers
Sodium silicate? How can we use it in clay?
Yay, i like this video 😂
John, it works for me, cheers
Thank you for your video. It has given me InSite into my own upcoming refractory brick project. ☮️🙏😂
@@johnburns2940 I think smaller sawdust may give a stronger brick, cheers
A good project it will be interesting to see how robust the tiles are in use. I may have a go for my Wood burner are they are herendousely expensive. I just need to convert your measurements into proper units. 🤣
Ah, the old metric and imperial, I use both and sometimes in the same sentence, 3mtrs of 4 x 2. You could make your own very small kiln, cheers
I wonder how Thermolite building blocks would stand up the heat?
I want to make these for a pizza oven floor, what kind of clay was that did you dig it from the ground or did you buy it? Also what type of wood saw dust pine or hardwood? Thanks hope it's still holding up. 😀
Hi the saw dust was just from where I was processing firewood with a circular saw so a mixture of species. The clay was dug from 2 feet down in the meadow and processed to remove the large lumps, see one of my other videos about this (wild clay processing) under the ceramics playlist, subscribed? cheers
What was the process after making the wet bricks, air dry and then into the kiln? Certainly have a nice sound to them
Matt, yes that's right. They took about 2 weeks to dry thoroughly, and then into the kiln, cheers
Just keep the molds in a bucket of water.. and lightly dust the inside with sand prior to placing the clay inside it.. look up james Townsend fire brick
Thanks for this, pertinent if you are batch making. The main thing here is that 50% sawdust does a fire brick make, cheers
looks the same density as refractory concrete used to line chimneys. be interesting to see how they hold up.
Simon, I'm pleased with the outcome, might be worth testing one with a blow torch, cheers
Can we mold it in porous gypsum mold just pressing into the cavity by hand? Thank you sir.
From Addis Ababa, Ethiopia 👍🇪🇹
HI, the best thing is for you to try it and let me know. I would help with the drying, but I assume that would not be a problem where you live, cheers
Better to rub the sides of the mold with little oil from frying waste . Very great job
Thanks for the idea, these bricks work well in my pottery kiln and the wood stove, cheers
If you wet the frame it will release easely the brick
Yes a bit of lubrication works wonders, cheers
The first few minutes of this video is a static shot of things just sitting there. You are supposed to do a show and tell when making a video. You didn't show what was being described.
Are you a troll? the video starts talking about firebricks within the first 50 seconds, before that it gives some background. This is not a youtube short designed for short attention spans, so an intro is quite acceptable. Hope all is good in your world, cheers