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Greetings folks
My dome will have a 30" inner diameter with 2" thick walls.
I've calculated the shell volume to be 53 liters.
My proposed mix is the standard 3:1:1:1 homebrew.
Sand (3 parts) -- 33 L
Fireclay (1 part) -- 11 L
Hydrated lime (1 part) -- 11 L
Portland cement (1 part) -- 11 L
I've determined that 66L will be required to allow for compaction + the addition of water. After wet mixing this will probably bring the volume down to around 58l...a bit more than required but best to have a little spare just incase.
1% of wet mix polypropylene fiber = 0.6l
Does the 66 L dry --- 58 L wet--- 53 L placed shrinkage chain look reasonable in practice? Would there be a further in reduction in dry to wet?
Also regarding the alkali resistant fibers, does the 2% addition assume a wet mix also?