A few questions about materials:
1. Vermiculite versus Perlite: is one better than the other?
2. If using Vermiculite, what granule size is best for (1) lightweight concrete, (2) mortar and (3) loose insulation between the dome and outside structure?
3. If using self mix mortar does it matter what type of sand is used?
4. Most fire bricks I've seen advertised are 42% alumina: is this OK for floor and dome?
5. If using regular clay bricks rather than fir bricks for dome, what mortar mix should be used?
Thanks, in advance, for any replies.
Chris Bowman (in the UK)
1. Vermiculite versus Perlite: is one better than the other?
2. If using Vermiculite, what granule size is best for (1) lightweight concrete, (2) mortar and (3) loose insulation between the dome and outside structure?
3. If using self mix mortar does it matter what type of sand is used?
4. Most fire bricks I've seen advertised are 42% alumina: is this OK for floor and dome?
5. If using regular clay bricks rather than fir bricks for dome, what mortar mix should be used?
Thanks, in advance, for any replies.
Chris Bowman (in the UK)
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