Howdy gang.
I'm much more relaxed about my measurements, and taking a similar approach to my castable mix, ingredients. That said, I am still awfully curious about a few things.
I can't find fire clay in stores, not sure i want to order it online and pay for all that shipping to the far eastern corner of America, so looking at other options.
I have a bunch of firestop but that isn't structural, hard as all get out, but won't support itself.
I have some noxcrete, and clearly comfortable using that by itself, but it's not insulated. My thoughts are to get that mixed right, then mix it with a 50:50 blend of the firestop and vermiculite. Maybe toss in a bunch of the thinnest stainless fasteners I can find (the noxcrete comes with stainless needles)
Would it ruin the castable?
I am not cobbing but building a container of concrete blocks and filling it with vermiculite around the core, so that won't offer much support, but PLENTY of insulation.
Looking for thoughts, ideas, rants and reflections. If you have ANY refractory experience I'd love to hear from you or read shared links.
Thanks so much and y'all keep up the great work!