 Re: Cinder and basalt in oven construction
Volcanic pumice is a good insulator, you use it exactly like vermiculite, either in loose fill or as a concrete aggregate.
Basalt, I don't know about. It's an igneous rock like granite, and therefore really hard to cut. I don't know about it's thermal properties. I know granite chips away (flame finished) when intense heat is applied to the surface.
Around here, on the US east coast, "blue stone" is a form of slate. That you don't want. I know Kalapana isn't talking about that, but I thought I'd throw it in for anyone else reading the thread |