#1  
Old 07-13-2008, 06:23 PM
Serf
 
Join Date: Jul 2008
Location: Perth, Australia
Posts: 12
Default Identifying bire bricks

I've just bicked up some fire bricks for a good price and am now a bit worried they may be heavy duty. The guy said they were ideal for a pizza oven but some people will say anything for a sale.

Is there a way to identify the different grades? They are standard house brick size, off white in colour and weigh a bit over 11 pounds. They are also very hard with sharp edges.

thanks in advance
Reply With Quote
  #2  
Old 07-13-2008, 08:01 PM
dmun's Avatar
Moderator
 
Join Date: Jul 2005
Location: New Jersey USA
Posts: 4,216
Default Re: Identifying bire bricks

High duty bricks are harder. A standard fireplace grade firebrick will cut more easily than a common red brick, and a high duty one will be more difficult to cut. Other than that, without a test of the alumina content, it's hard to tell.
__________________
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 07-14-2008, 12:14 AM
nissanneill's Avatar
Il Pizzaiolo
 
Join Date: Apr 2007
Location: Adelaide, South Australia
Posts: 1,847
Thumbs up Re: Identifying bire bricks

Hi fire bricks are as dmun says very hard to cut, almost like cutting as block of steel.
They are also much much heavier than the low or medium fire brick.

Neill
__________________
Prevention is better than cure, - do it right the first time!

The more I learn, the more I realise how little I know


Neillís Pompeiii #1

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

Neillís kitchen underway

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #4  
Old 07-14-2008, 01:49 AM
Serf
 
Join Date: Jul 2008
Location: Perth, Australia
Posts: 12
Default Re: Identifying bire bricks

thnks for your replies guys. I haven't tried cutting them yet but have broken one with the bolster and hammer. It was pretty hard.

If they are high duty bricks can I still use them but maybe cut them thinner so they don't take so long to heeat up?
Reply With Quote
  #5  
Old 07-14-2008, 01:54 AM
nissanneill's Avatar
Il Pizzaiolo
 
Join Date: Apr 2007
Location: Adelaide, South Australia
Posts: 1,847
Thumbs up Re: Identifying bire bricks

Any brick cut thin will heat up quicker as there is less thermal mass. My understanding with medium and high heat bricks are that they will absorb more heat and get hotter for their specialty applications in foundries etc.
High duty bricks will get a lot hotter, probably hotter than you would want your oven to cook in but then again it will be up to you with experience to control and maintain your temperature level.

Neill
__________________
Prevention is better than cure, - do it right the first time!

The more I learn, the more I realise how little I know


Neillís Pompeiii #1

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

Neillís kitchen underway

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #6  
Old 07-20-2008, 12:40 PM
Serf
 
Join Date: Jul 2008
Location: Perth, Australia
Posts: 12
Default Re: Identifying bire bricks

well I've cut some of these and they are very hard so I guess they're high duty. Am I better off using these to make my oven or solid red house bricks. I've read that the reds take along time to heat up. Is this true of the high duty also

gecko
Reply With Quote
  #7  
Old 07-21-2008, 02:37 AM
nissanneill's Avatar
Il Pizzaiolo
 
Join Date: Apr 2007
Location: Adelaide, South Australia
Posts: 1,847
Thumbs up Re: Identifying bire bricks

Hi Gecko,
Not to my knowledge!
Solid red house bricks that have been fired at around 1100/1200˚C will heat up just as well and as quickly as any other brick. Because they are reasonably dark in colour, they will absorb the heat rather than reflect it. If the heat is not being absorbed by the bricks, where else apart from escaping out the door and up the chimney, can the heat go?
These bricks are plentiful, cheap (or even free), easier to cut and do not spawl like a lot of people believe. I know that there are bricks and there are bricks but Russell Jeavons and a local fire brick company sell more solid 4" pavers than firebricks for oven builds. My next 2 ovens will built using these bricks.

Neill
__________________
Prevention is better than cure, - do it right the first time!

The more I learn, the more I realise how little I know


Neillís Pompeiii #1

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

Neillís kitchen underway

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #8  
Old 07-21-2008, 04:55 PM
Serf
 
Join Date: Jul 2008
Location: Perth, Australia
Posts: 12
Default Re: Identifying bire bricks

thanks for the reply Neill,
So are you saying that the red house bricks would be better than the high duty fire bricks I have? I am a bit worried that the High duties will get too hot and/or take too long to heat up.

gecko
Reply With Quote
  #9  
Old 07-21-2008, 05:51 PM
christo's Avatar
Master Builder
 
Join Date: Feb 2006
Location: Eastern NC
Posts: 910
Default Re: Identifying bire bricks

I think Neil is trying to give you info and alternatives.

The final judgement is yours - if you think the firebricks you have are workable - go for it. If you don't (as Niel says) many people have been successful with red brick.

I got lucky and had medium duty firebricks easily available - they cut like butter in the bricksaw and were a joy to work with. If I could not have found them - I'd would have gone with Niels sugesstion.

After having a functional oven for a year, I still have the best memories about building it - close seconds are the wonderful meals. Enjoy the build!!!

Christo
__________________
My oven progress -

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
  #10  
Old 07-21-2008, 11:46 PM
Serf
 
Join Date: Jul 2008
Location: Perth, Australia
Posts: 12
Default Re: Identifying bire bricks

Hi Christo,
I'm just trying to gather enough info to make the right decision and avoid ending up with an oven that is not going to work too well. I dont mind cutting the harder high duty bricks if they're going to do the job but will gladly but something else if they are unsuitable.
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
Red Bricks and Mortar marcusjn Newbie Forum 18 06-14-2010 12:29 AM
Shipping Bricks cplain Humor 1 06-12-2008 03:40 AM
Just got 3 tons of bricks... phoenixzorn Getting Started 0 10-21-2007 07:18 PM
FB Materials List Hendo Getting Started 21 03-09-2007 01:28 AM
using second hand bricks boccu Pompeii Oven Construction 4 12-15-2006 09:13 AM


All times are GMT -7. The time now is 05:46 PM.

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