Concrete for fire pit?

Reply

  #1  
Old 05-17-14, 09:18 AM
J
Member
Thread Starter
Join Date: Jul 2010
Location: USA
Posts: 58
Received 0 Votes on 0 Posts
Concrete for fire pit?

Hello. I've got a concrete slab outside that was once used for a shed and is now a small basketball court. It's about 16'x12'. It's getting pretty rough, so I'd like to pour a new one. My wife wants a fire pit out back. Can I use the broken up concrete to make the fire pit? We will probably just use cut up firewood and branches in the fire pit. Would there be risk of the concrete exploding? Do I have to use fire brick?
 
Sponsored Links
  #2  
Old 05-24-14, 02:16 PM
J
Member
Thread Starter
Join Date: Jul 2010
Location: USA
Posts: 58
Received 0 Votes on 0 Posts
Fair enough. Plan B- Dig a big hole, line the outside with aluminum coil with steaks to hold the dirt back. Would the coil give off any toxins if it were to get hot?
 
  #3  
Old 05-24-14, 08:16 PM
BridgeMan45's Avatar
Member
Join Date: Oct 2011
Location: USA
Posts: 3,196
Received 1 Vote on 1 Post
What do you plan to do with the puddle of formerly-molten but now solidified aluminum at the bottom of the pit? I don't think it's a good idea.

Whatever kind of steaks you use to hold the soil back, they will start to rot and smell before too long. Although rib eye might do better than porterhouse.
 
  #4  
Old 05-25-14, 04:11 AM
S
Member
Join Date: Dec 2013
Location: usa
Posts: 1,348
Received 1 Vote on 1 Post
i don't recall concrete ' exploding ' but the aggregate in it can,,, there's a reason we line fireplaces w/hi-temp brick but i forget what it,,,,,,,,,,,,,,,,,,,,,, oh, yeah, NOW i remember,,, its for safety

imn-s-hfo, the better steaks to use would be pork - less expensive
 
  #5  
Old 05-25-14, 07:33 AM
L
Join Date: Feb 2014
Location: USA
Posts: 238
Received 0 Votes on 0 Posts
You would be better off going to a junk yard and buy an old 10.00X20 truck rim to use for a liner of a fire pit. Set the rim an 4 fire bricks and you have a fire pit that you will be able to set a round grill grate from a charcoal grill on top. If you want, you can dry stack stones around the pit leaving ~8" of clearance. This will keep the blocks from overheating. Leave small spaces between the rocks on the bottom row to let air into the fire.
 
  #6  
Old 05-25-14, 08:48 AM
L
Join Date: Feb 2014
Location: USA
Posts: 238
Received 0 Votes on 0 Posts
Just found this article that may help.

Your Fire Pit Options | DoItYourself.com
 
  #7  
Old 05-25-14, 11:01 AM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,967
Received 5 Votes on 5 Posts
If you choose to use a truck rim, locate a Budd wheel, since Daytons have no center. Turn the wheel so the projection of the inner part sticks up. That, coupled with the brick will allow for ash collection and air circulation
 
  #8  
Old 05-26-14, 04:22 PM
J
Member
Thread Starter
Join Date: Jul 2010
Location: USA
Posts: 58
Received 0 Votes on 0 Posts
Thanks for the tips.
I plan on the pit being about 10 feet in diameter.
The only fire brick I found searching online were 4.5"x9"x1.25" and are 6 for $27. I would need over 700 bricks at those dimensions. The math doesn't look good for my wallet. Plan C and D are this:
C- Build a form and pour concrete, then coat the inside with refractory mortar.
D- Use fire rated CMUs
For a pit this size, would one of these options (or something else) work?

EDIT: By the way, the pit is just for bonfires. I don't plan on putting a grate on it, or cooking anything (well, maybe marshmallows). I just want a spot I can burn branches and logs without having a pile of ash on the lawn, and where the sides won't cave in.
 
  #9  
Old 05-26-14, 10:56 PM
BridgeMan45's Avatar
Member
Join Date: Oct 2011
Location: USA
Posts: 3,196
Received 1 Vote on 1 Post
Not cooking anything? What happened to those (rib eye and porterhouse) steaks you mentioned earlier?

Or did you possibly mean "stakes"?
 
  #10  
Old 05-27-14, 02:19 PM
J
Member
Thread Starter
Join Date: Jul 2010
Location: USA
Posts: 58
Received 0 Votes on 0 Posts
That's cute.

This sentence is just for the 25 character minimum.
 
  #11  
Old 06-11-14, 01:20 PM
J
Member
Thread Starter
Join Date: Jul 2010
Location: USA
Posts: 58
Received 0 Votes on 0 Posts
Fair enough... Option E it is: Line the pit with fireworks.
 
  #12  
Old 06-11-14, 04:34 PM
BridgeMan45's Avatar
Member
Join Date: Oct 2011
Location: USA
Posts: 3,196
Received 1 Vote on 1 Post
Porterhouses or rib eyes would taste a lot better than fireworks.
 
Reply
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 Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description: