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  #71  
Old 12-15-2012, 07:26 PM
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Default Re: foam concrete

I used the "air block" as insulation under the hearth of my oven - essentially the same as the "foamed concrete", I think. No problems so far; seems to hold heat and the blocks are set on edge, giving me 7 inches of insulation, with the hearth floating on top. I posted photos on this site.
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  #72  
Old 03-23-2013, 02:52 PM
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Default Re: foam concrete

A vid on foam concrete, anyone speak Spanish?

Foam concrete - YouTube
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  #73  
Old 03-23-2013, 06:11 PM
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Default Re: foam concrete

Blocks of foam concrete are being used in general construction here; taking the place of wall insulation and a small, soft red brick. I assume they are not quite as strong but they are certainly lightweight, cheap and make buildings cooler. I have no idea how they are manufactured here in Thailand - I just hope they ones I used last a long time. They can be replaced(in my oven) but it would be a pain. I fired my oven the first time, about a year ago and used it 2 times a week on average.
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  #74  
Old 04-09-2013, 04:04 PM
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Default Re: foam concrete

I'm in Folsom, CA and looking for the "ceramic fiber insulation board" used on the oven stand beneath the oven floor. Any local sources?
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  #75  
Old 04-09-2013, 06:17 PM
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Default Re: foam concrete

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Originally Posted by robinwham View Post
I'm in Folsom, CA and looking for the "ceramic fiber insulation board" used on the oven stand beneath the oven floor. Any local sources?
Forno Bravo (our hosts) should be reasonably close to you .
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  #76  
Old 03-30-2015, 01:04 AM
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Default Re: foam concrete

Just bumping this thread. I continue to use the foamcrete, but have to admit that I usually use 50/50 volume with vermiculite and perlite mix which makes the mixing process easier. The result is that I end up with a product that is cheaper than vermicrete alone and has less absorbency as well as using less water in the mix, meaning less water to remove. Win/win I reckon.
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  #77  
Old 03-30-2015, 02:38 AM
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Default Re: foam concrete

G'day Davids
What's the stuff like to handle. Vcrete/ pearlcrete a devil to get to do what you want. Get a flat surface for a base or get to stick to a dome. I like the term"Devils porridge" it about sums it up.
Regards dave
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  #78  
Old 03-30-2015, 02:56 AM
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Default Re: foam concrete

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Originally Posted by cobblerdave View Post
G'day Davids
What's the stuff like to handle. Vcrete/ pearlcrete a devil to get to do what you want. Get a flat surface for a base or get to stick to a dome. I like the term"Devils porridge" it about sums it up.
Regards dave
Dave,
I've mixed up tons of vermicrete so I'm pretty used to it, but have found a few tricks to help it work better. Getting a good working mix is difficult and lots of people add more cement in order to get it to stick together more. This is a mistake if you want it to insulate well as the extra cement reduces the insulating capacity by increasing density and thermal conductivity. The correct amount of water is also crucial. I've found that 1/3 of the volume of vermiculite is the correct amount of water to add ie for every 10L add 3L water. Also a mix of 50/50 perlite and vermiculite works way better than either of them alone. I also throw in a handful of powdered clay for every 10L batch.This helps give it good workability.
When using foam it takes more careful mixing and it needs to be folded in gently like stirring in egg whites in a cake mix.the stuff needs to be mixed evenly, but if over mixed will start to deflate.

Last edited by david s; 03-30-2015 at 08:30 AM.
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  #79  
Old 03-30-2015, 06:01 AM
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Default Re: foam concrete

David,
I intended to refer back to this thread last night. But, my eyelids got a little heavy. I'm still very interested in your homemade foam generator and the foamcrete. I keep saying to myself that I am going to experiment with it myself. I'm fixin to have a little more time on my hands. Maybe, that will be one of the projects that I get to play with .

I'm looking forward to more of your experiments with the product.

Joe W.
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  #80  
Old 03-30-2015, 09:28 AM
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Default Re: foam concrete

Quote:
Originally Posted by Gulf View Post
David,
I intended to refer back to this thread last night. But, my eyelids got a little heavy. I'm still very interested in your homemade foam generator and the foamcrete. I keep saying to myself that I am going to experiment with it myself. I'm fixin to have a little more time on my hands. Maybe, that will be one of the projects that I get to play with .

I'm looking forward to more of your experiments with the product.

Joe W.
Joe,
My eyelids were a little heavy last night too, but I think it was the Prosecco.
With all the interesting things Italians do with concrete, I'll be renewed with enthusiasm to experiment more with the stuff myself. Thinking of casting blocks of the stuff to carve and recoat maybe. Back start of May.
Dave
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Last edited by david s; 04-01-2015 at 01:48 AM. Reason: Ipad misspelling
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