Forno Bravo Forum: The Wood-Fired Oven Community

Forno Bravo Forum: The Wood-Fired Oven Community (http://www.fornobravo.com/forum/)
-   Forum Guidelines (http://www.fornobravo.com/forum/f14/)
-   -   Perlite Ratio (http://www.fornobravo.com/forum/f14/perlite-ratio-18395.html)

Shay 09-21-2012 08:55 AM

Perlite Ratio
 
Hello everyone

What is the ratio of perlite, cement, and sand to build a pizza oven dome?
What is the thickness required to build the dome before the layer insulation?



Thanks :)

david s 09-21-2012 04:10 PM

Re: Perlite Ratio
 
Quote:

Originally Posted by Shay (Post 138930)
Hello everyone

What is the ratio of perlite, cement, and sand to build a pizza oven dome?
What is the thickness required to build the dome before the layer insulation?



Thanks :)

If you build the dome with perlite in the mix it will not be dense enough to store heat.
Generally the dome thickness is between 2-4" thick depending on the materials used.
Suggest you download the free plans or read lots of build threads to get a better idea of design principles.

Shay 09-22-2012 05:30 AM

Re: Perlite Ratio
 
1 Attachment(s)
Thanks

I have just design and built the first arc already (attached a picture)
Now I have to build the rest of the oven and I wanted to build from perlite and cement
But I do not know about the right ratio

brickie in oz 09-22-2012 05:46 AM

Re: Perlite Ratio
 
Like David said, you cant build an oven out of perlite and cement, it just wont work. :eek:

Shay 09-22-2012 06:10 AM

Re: Perlite Ratio
 
if so what are my options instead if I do not want to
build from bricks?

david s 09-22-2012 01:24 PM

Re: Perlite Ratio
 
Use a dense castable refractory. Search the forum for this material and read all you can. You can buy the stuff from a refractory supplier.

Johnny the oven man 09-26-2012 10:20 PM

Re: Perlite Ratio
 
Perlite and its neighbour Vermiculite are insulators, and wont hold heat. As David S mentioned use a Refractory dense castable, a 1350c grade is most likely the easiest and cheapest option. approx $25-$30/25 kg bag.Dont know the size of your oven, but if you calculate the volume of the prefered dome, you can use the 80 bags/m3 figure to work out your requirement, or if your old like me, 2 bags/Ft3. THEN use your Perlite mix over that dome to keep the heat in.


All times are GMT -7. The time now is 10:05 PM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC