#1  
Old 07-16-2009, 09:31 AM
Serf
 
Join Date: Jul 2009
Location: Kansas
Posts: 2
Default Cement ?

Ok I searched an did not see an answer for this.
Can cement be used too make a clay like style oven or maybe even using a large drain pipe cut off ?
Would one reason be because of the insulation or can a certain cement mixed with perlight(sp) be used .
Thanks for the info and educating the newbie,
john
Reply With Quote
  #2  
Old 07-16-2009, 10:01 AM
dmun's Avatar
Moderator
 
Join Date: Jul 2005
Location: New Jersey USA
Posts: 4,216
Default Re: Cement ?

Ordinary concretes, made with portland cement, sand, and gravel, do not withstand the heat of an oven. They will crack and break apart.

Whatever you make your oven from, brick, castible refractory, clay, you will need insulation completely surrounding the oven. This is where the perlite (or vermiculite) concrete comes in. It's never in direct contact with flames or oven heat.
__________________
My geodesic oven project:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
,
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #3  
Old 07-16-2009, 12:01 PM
Serf
 
Join Date: Jul 2009
Location: Kansas
Posts: 2
Default Re: Cement ?

Cool that answers the cement one.. I see that you can purchase clay flu pipe in 36 Dia and was thinking that could be cut in half and used as a dome and then insulate it after the fact.
Any thoughts?
Reply With Quote
  #4  
Old 07-16-2009, 03:32 PM
dmun's Avatar
Moderator
 
Join Date: Jul 2005
Location: New Jersey USA
Posts: 4,216
Default Re: Cement ?

Quote:
I see that you can purchase clay flu pipe in 36 Dia
We'd sure like a link on that one! Who says there's nothing new in the world? Is it round or "square"?

I just did some googling to answer my own question. The reliable Superior Clay has round ones in 36. Remember, that's a flue tile, and probably not much more than an inch thick. You would probably want some additional mass to bring it up to the thickness of whatever you do on the ends (or the top, I don't know which orientation you're planning).

Just a couple of notes on flue tiles. We've heard repeated reports of them cracking. You probably don't want to fire it up until it's finished and insulated, to reduce thermal shock. Also, it can be cut with a diamond blade in an angle grinder, but it's NOT a fun job. Wear lung, ear, and eye protection.
__________________
My geodesic oven project:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
,
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #5  
Old 07-16-2009, 05:20 PM
timo's Avatar
Apprentice
 
Join Date: Mar 2009
Location: Northern Illinois
Posts: 126
Default Re: Cement ?

Yes, the flue tile is very hard and heavy. It is loud on the ears when cutting and you don't want the orange dust in your lungs. Diamond blade in angle grinder will do it like dmun said.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
How bad are cement bricks? zeek General Building and Construction 6 10-07-2009 10:54 PM
Mixing cement for the Hearth by hand blacknoir Getting Started 6 07-13-2009 09:30 PM
High Alumina cement.......how to? Chickensoup Getting Started 1 07-09-2009 02:32 PM
cement question boily Getting Started 6 06-12-2009 02:21 AM
Cement Curing Conditions rlf5 Getting Started 4 07-18-2007 06:50 AM


All times are GMT -7. The time now is 09:30 AM.

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