refractory castable for floor Pompeii Oven Construction Discuss refractory castable for floor in the Pizza Oven Design and Installation forums; I have seen previous posts for potential use for castables for the pompeii floor. From reading the pompeii pdf, it ...

[chale]

I have seen previous posts for potential use for castables for the pompeii floor. From reading the pompeii pdf, it says that low duty bricks contain about 50% silica and 30% alumina. The instructions also indicated to stay away from refractory insulating bricks because they will not absorb heat enough.

That being said, there is a refractory insulating castable for sale on ebay [Pacocast 24 by Resco products] that has a similar silica/alumina ratio....BUT it is referred to as refractory insulating castable. So is this usable for the floor or dome?

[dmun]

No. It's an insulating product, like a very expensive vermiculite concrete.

[Johnny the oven man]

Insulating castables are in most cases very soft, so abrasion would also be a big problem. The denser the better for the base.