strengthening outer layer to sodium silicate, perlite mix.

Hi everyone. This is a question about building an oven. But I thought to post it here as it did not fit anywhere else and that this might be a question that can be applied to rocket stoves also.

I'm starting to think about building a very light, small but not supersmall pizza oven without chimney and gas powered. Youtube is full of cement vermiculite suggestions for the dome..  
I am aiming for a solution without sheath metal.

I thought maybe its possible to use waterglass perlite mix instead of cement, to make it even more light. And reinforce it with ...?  from the outside.

Would woven fiberglass+epoxy be an option? Anybody tried this in a portable rocketstove?

Thank you  )

Welcome Andreas!
Rather than using fiberglass and resin, how about adding rock wool top your mix?
I have found  rockwool to be a readily available and cheap fiber to add to high temperature mixes.
A calcium aluminate cement calcium aluminate cement like RapidSet  CementAll, will handle any heat that gets past the insulation layer, plus it sets up very quickly.

William Bronson wrote:Welcome Andreas!
Rather than using fiberglass and resin, how about adding rock wool top your mix?
I have found  rockwool to be a readily available and cheap fiber to add to high temperature mixes.
A calcium aluminate cement calcium aluminate cement like RapidSet  CementAll, will handle any heat that gets past the insulation layer, plus it sets up very quickly.

Great input, William. 🙏
Like this I would harden the shell more simply and not use fancy webbing for structural strength. Maybe still save some weight compared to the cement vermiculite version.  Better insulation for sure...



Edit offon topic...  Williams rockwool waterglass combination could be used to solidfy rockwool just by itself, compressed to a (stronger?) Lighter Brick .. or even a larger form. Someone tried?