Introduction: Concrete Fire Bowl

Picture of Concrete Fire Bowl

This bowl is made out of fireproof concrete.

The pictures below give only an overview of the individual steps
for a larger and better view, download the Pdf file :)

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Comments

ZacWolf made it! (author)2016-08-11

I changed up the recipe a bit.

I had an existing solid copper fire pit that I picked up at Costco about 10 years ago (before the price of copper jumped so high). So I didn't have to make the sand form, I just flipped the copper bowl upside down and used that as the form. I covered it with cling-wrap, and added a red-cup on top that would become the main drainage hole. I then mixed up some sand and elmer's glue to make channels between the cup and drain holes in the copper bowl (that would allow the copper bowl to drain into the concrete bowl below).

I used a bucket of refractory cement, to which I added a bag of perlite, I then covered the entire copper bowl (and the sand drainage channels) with that mixture; spreading it out to about 3/4" thick everywhere. I let that dry overnight.

I then mixed up an 80lb bag of fiber reinforced concrete (to which I added a bonding agent); spreading that about 1.25" over the refractory pour from the day before. I let it cure in place for four days. I then flipped it over, and the copper bowl came right out. I pulled up all the cling wrap and then took a torch (propane plumbing torch) and heated the inside to melt away any cling wrap that got caught in the concrete.

Refractory Cement:
https://www.amazon.com/gp/product/B008BQQASQ

Perlite:
https://www.amazon.com/dp/B00GTDI6YO

Fiber Reinforced Concrete:
https://www.lowes.com/pd/QUIKRETE-Profinish-Crack-...

Bonding Agent:

https://www.lowes.com/pd/Sika-32-fl-oz-Masonry-Bon...

steel brush to it to remove any loose sand from the drain channels, etc.

ZacWolf (author)2016-07-28

Do you know if Chamotte Grain is the same as Perlite or Vermiculite? I'm gonna try and make this with a layer of refractory cement mixed with Perlite, and a layer of fiber reinforced concrete. Instead of a sand form I already have an awesome 32" solid copper fire-pit bowl that I'm gonna flip over and coat with a release agent (so I can remove it to clean it and easily dump the ashes. I'll let ya know how it goes!

canewkirk (author)2016-06-16

BRAVO ! This could be the best single project ever posted on this web site. Congratulations on a fine project and execution. Did your results come out this good on your first effort ?

PitStoP (author)2016-06-10

Was that sand you used to make the bowl?

PitStoP (author)PitStoP2016-06-10

bowls shape*

_mpo_ (author)PitStoP2016-06-13

Yes it's sand. The one needed for the sandbox of children.

flyingpuppy (author)2016-06-12

So elegant! I love also how you placed the fire bowl on boulders. This should be in the HGTV magazine!

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