Go Back   Forno Bravo Forum: The Wood-Fired Oven Community > Oven Management > Firing Your Oven

Like Tree1Likes

Reply
 
LinkBack Thread Tools Display Modes
  #21  
Old 12-09-2007, 10:53 AM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,649
Default Re: Curing, Cracks & Other Kentucky Conundrums

Quote:
Originally Posted by gjbingham View Post
Ken,
I think the theory of the outward force of the dome expansion is correct too. It sounds like the sag of the arch is a secondary failure, occurring after the original problem of the dome's expansion forces causing the mortar debonding.
That's exactly what I'm seeing. I think that's a good analysis.

Quote:
If you're not seeing any tilt in the vent walls, then I would guess the weight of the arch and vent is probably not the real problem.
The left vent wall must be moving slightly during heat-up/cool-down causing the mortar debonding from the arch. Before I fire back up, I'll start taking measurements of everything to see if I can figure out what's moving and where so I can quantify exactly what's happening.

Quote:
I'm going to go out and look at mine. I haven't noticed any cracks yet. Maybe I'm just not looking hard enough.
We all will have cracks (some small/insignificant and some big) With that much heat, mass and mortar, something has to give somewhere.
__________________
Ken H. - Kentucky
42" Pompeii


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Updated!


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.


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
  #22  
Old 12-09-2007, 06:07 PM
Journeyman
 
Join Date: Oct 2006
Location: Adelaide, Australia
Posts: 257
Default Re: Curing, Cracks & Other Kentucky Conundrums

Quote:
Originally Posted by Frances View Post
Don't know if this is any help (well, it isn't in this case, but maybe in general) but from a gut feeling I would have thought that a full rounded archway is structurally stronger than one with a flattened rounded top, which a lot of people seem to be building at the moment. Or not?
Frances, Wade, Ken, George et al,

There’s also some useful information in the link in my post at
http://www.fornobravo.com/forum/f8/o...html#post13952 (Oven (Floor - Wall - Dome) Fire Bricks Thickness?!)

Although the article focuses mainly on semi-circular arches, you can see that for a ‘segmental arch’ (about half-way down on the left) the direction of thrust meets the arch support at the top of the support, rather than on the floor like a semi-circular arch. If we extend these lines of thrust for our ‘flattened rounded top’ oven openings, in most cases they would end up in space very quickly, unless some kind of solid buttressing is employed to contain the line of thrust all the way to the floor. While I’m no expert, common sense tells me that the ramifications for stresses and consequential movement would be way greater than for a semi-circular arch.

Paul.
Reply With Quote
  #23  
Old 12-11-2007, 05:30 PM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,649
Default Re: Curing, Cracks & Other Kentucky Conundrums

Finally got a break in the weather to do my first test fire after repair.

I did a 2-3 hour slow burn today with damp wood (thanks to the recent rain). This worked well. I didn't want a really hot fire, just warm saturating heat. So far so good. No cracks, but again, I didn't get close to burning off any carbon on the dome.

Heat underneath the floor??? After 2-3 hours of low temp fire I felt the underside of the hearth (the roof of the storage area). The concrete felt warm to the touch. Not hot, but pretty warm. Is this normal??. Because of the problems I've been having, I'm getting paranoid and am worried the Kaowool boards I used underneath aren't cutting the mustard.

I'm guessing one of three things,
1. The boards are a little moist and all is well;
2. A warm hearth is normal and all is well;
3. I've created the Heat Sink From Hell and my daughter's Easy-Bake Oven will cook better pizza.

How warm does the underside of your hearth get??
__________________
Ken H. - Kentucky
42" Pompeii


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Updated!


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.


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
  #24  
Old 12-12-2007, 05:57 PM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,649
Default Re: Curing, Cracks & Other Kentucky Conundrums

I did another burn today. I really cranked it up and was able to get the top 4-5 courses white. At one point I reached in the oven to add some wood; upon pulling out my arm I noticed my right hand and wrist no longer had hair. I was pretty happy with the heat being generated .

My repaired mortar joints came through like champs. Jahysea, your suggestion of grinding out the mortar and remortaring appears to be the correct prescription. Thank you!

I noticed one hairline crack in an adjacent joint, but it never opened up. I'm thinking the oven may be about finished moving/shifting around so I'll add some reinforcement to the top of that joint and call it fixed.

We have a winter storm forecast here in Kentucky this weekend (finally!!), after that I'll add the vermiculite and continue work on the enclosure.

Thanks again for everyone's advice. It was all very helpful.
__________________
Ken H. - Kentucky
42" Pompeii


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Updated!


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.


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
  #25  
Old 12-12-2007, 08:34 PM
dmun's Avatar
Moderator
 
Join Date: Jul 2005
Location: New Jersey USA
Posts: 4,216
Default Re: Curing, Cracks & Other Kentucky Conundrums

Quote:
Originally Posted by Ken524 View Post
Heat underneath the floor??? After 2-3 hours of low temp fire I felt the underside of the hearth (the roof of the storage area). The concrete felt warm to the touch. Not hot, but pretty warm. Is this normal??. Because of the problems I've been having, I'm getting paranoid and am worried the Kaowool boards I used underneath aren't cutting the mustard.

I'm guessing one of three things,
1. The boards are a little moist and all is well;
2. A warm hearth is normal and all is well;
3. I've created the Heat Sink From Hell and my daughter's Easy-Bake Oven will cook better pizza.

How warm does the underside of your hearth get??
I fired this afternoon, to cook pizza at 6, raked out the fire and baked a pie after dinner. At 11, the oven with the door on is still at 350f, and the underside of the slab is just lukewarm. 2.5" insblock19 here. I suspect that your insulation is still a little damp.
Reply With Quote
  #26  
Old 12-12-2007, 09:29 PM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,649
Default Re: Curing, Cracks & Other Kentucky Conundrums

Quote:
Originally Posted by dmun View Post
I suspect that your insulation is still a little damp.
I'm pretty sure that is what's going on. The Kaowool board was pretty damp during the build and the weather has been really humid lately. I've just scratched the surface with fire.

Thanks for the feedback.
__________________
Ken H. - Kentucky
42" Pompeii


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Updated!


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.


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
  #27  
Old 12-12-2007, 09:59 PM
Il Pizzaiolo
 
Join Date: Jan 2007
Location: Tampa, FL
Posts: 1,446
Default Re: Curing, Cracks & Other Kentucky Conundrums

OK, I have to ask.....has anyone actually tried making a tiny pizza in an Easy Bake Oven? Come on, be honest. All of us are guilty of putting unusual things in our sister's, neighbor's, or daughter's Easy Bakes...Has pizza been tried???

RT
Reply With Quote
  #28  
Old 12-13-2007, 10:34 AM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,649
Default Re: Curing, Cracks & Other Kentucky Conundrums

Thanks for the laugh, RT. I'm sure there's an Easy-Bake oven forum somewhere where they whip up gourmet dishes with those things.
"Thanksgiving Dinner - All from our Easy Bake Oven!"
__________________
Ken H. - Kentucky
42" Pompeii


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Updated!


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.


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
  #29  
Old 12-13-2007, 11:45 AM
asudavew's Avatar
Il Pizzaiolo
 
Join Date: Jul 2007
Location: san angelo, texas
Posts: 1,877
Default Re: Curing, Cracks & Other Kentucky Conundrums

Here' a link for yins!
It's Ken's deep dish easybake pizza.

Ken's Deep Dish Pizza Mix

Funny his name is Ken... could Ken be posing on another site?

Notice the 2 tbls of flour.
__________________
My thread:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My costs:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My pics:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Last edited by asudavew; 12-13-2007 at 11:47 AM.
Reply With Quote
  #30  
Old 12-13-2007, 11:47 AM
asudavew's Avatar
Il Pizzaiolo
 
Join Date: Jul 2007
Location: san angelo, texas
Posts: 1,877
Default Re: Curing, Cracks & Other Kentucky Conundrums

Uno mas


Easy Bake Oven Recipes
__________________
My thread:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My costs:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My pics:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
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
Oven Curing james Firing Your Oven 335 07-15-2014 07:12 PM
Cracks with smoke coming from them Jonathan Hart Pompeii Oven Construction 12 10-07-2008 03:57 PM
Cement Curing Conditions rlf5 Getting Started 4 07-18-2007 06:50 AM
Hello All mnlewis Introductions 26 07-05-2006 07:23 AM
Small cracks in vent Yahoo-Archive Design Styles, Chimneys and Finish 0 03-19-2005 08:38 AM


All times are GMT -7. The time now is 01:07 AM.

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