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when I built my dome (and laid the hearth bricks) in 2 days I removed the bricks supporting the top dome courses immediately and then stood on top of it, yep 85kg on wet mortar/bricks.
I did this also to enable me to clean the inside brick faces of surplus mortar when they were bedded onto the sand form.
If it is ever going to collapse, then it was that moment.
All domes if designed and built correctly are self supporting and should stay in place even without mortar or adhesive.
Prevention is better than cure, - do it right the first time!
The more I learn, the more I realise how little I know