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Post by satamax on Nov 15, 2014 14:49:10 GMT -8
Hi everybody.
Well, i discovered i can buy pozzolanic sand in big bags.
I'm wondering, how suitable would a mix of that sand and ciment fondu, to make a poured monolithic bell?
Karl, usualy you're the expert on thoses material questions, any advice?
Thanks guys.
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Post by Deleted on Nov 16, 2014 1:47:35 GMT -8
Pozzolanic sand could be any kind of volcanic sand like pumice, perlite, vermiculite, basalt, trass or furnace slag, grog, light or dense, hard or soft. Pozzolans have the most chemical advantages for cements with high amounts of lime and sulfates, eg ordinary portland cement. Pozzolans can be used to make portland cement fire resistant. For refractory cements without sulfates and small amounts of lime the chemical advantages of additional pozzolans may be small or absent. Nevertheless pozzolans may have physical advantages like insulative properties or abrasion resistance. ferrocement.net/ferro/files/pozzolans-uwe.html
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Post by satamax on Nov 16, 2014 4:36:14 GMT -8
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Post by Deleted on Nov 16, 2014 5:54:47 GMT -8
The page does not tell anything about composition, particle size 0/7 mm. It may not contain enough fine particles to work as a binder together with portland cement. Portland Pozzolana Cement (PPC), which is Portland cement mixed with up to 55% pozzolana dust is used for making pizza ovens.
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