Limestone as an alternative firebrick

[Bert]

Hi All

Firebricks are expensive here in Oz. My father in-law has these limestone slabs (approximately 600mmx300mmx75mm). I was wondering if limestone is a suitable alternative? I know that they use lime mortar in colder countries but that where my knowledge ends. I was thinking I could cut it down into appropriate size for the Pompeii oven. Its free which will save me considerable money. Putting the question out there. Can I use limestone as opposed to regular firebricks??

Thanks

Bert

[brickie in oz]

They burn limestone to make quick lime to make the hydrated lime you buy in a bag, so no you cant use it.

[Bert]

Bugger! Not the answer I was after Brickie from Oz, but thanks.

[azpizzanut]

Bert,

Limestone blocks would make a great base material. You can do your enclosure and other construction features with it. Maybe even tint the mortar for color contrast, etc.

Cheers,

[tusr18a]

Here is a video that will show you what would happen to the heated limestone if it was ever exposed to water. Interesting science project and bad wood fired oven material choice.

[dmun]

Yep, portland concrete is basically artificial limestone. I think you'd find the naturally occurring limestone would spall, crack, and crumble just as badly.

[brickie in oz]

Originally Posted by tusr18a

Here is a video that will show you what would happen to the heated limestone if it was ever exposed to water. Interesting science project and bad wood fired oven material choice.

What an excellent video..