Air crete and Ceramic fiber easy to cut.

Sure does cut easy.     The air crete also is much harder than before.     when it burns it does not get hot.

Testing the 3 inch riser out.   I can put my hand on the aircrete when it is going full tilt.

Cool!
I make perlite concrete, it cuts  this way as well.
I build in slabs and join them together.

William Bronson wrote: Cool!
I make perlite concrete, it cuts  this way as well.
I build in slabs and join them together.

Awesome...    

I have been thinking about putting pipes in the forms so that they would just slide into each other when I want to join them.

I am thinking of adding perlite to the air crete.

I'm not sure if perlite would add anything to aircrete.
Perlite is cheap and full of air,  but not as cheap and airy as a soap bubble!

The peg and slot idea is  good one.
I to help anchor the pipe would probably wire mesh to it,or run self tapping screws into it,or both.
Metal,even buried in the 'crete, could corrode significantly.
Basalt rear and mesh would fix that,  but I prefer locally available matirials,and I can't find it around here.

Thus far I have lined a junked file cabinet with the slabs,  using neat(strait) cement to merge them with each other to form my firebox.
I used some inserts in the forms in an attempt to form details like the port.
Next time I will just use my handsaw.

Today I started thinking you know people make rocket stoves out of cement blocks, what if those blocks had ceramic fiber inside of them?

I reflected on Matt Walkers case that he makes his riser out of.    Ceramic fiber sure changes the rules of the game.

Mart Hale wrote:

William Bronson wrote: Cool!
I make perlite concrete, it cuts  this way as well.
I build in slabs and join them together.

Awesome...    

I have been thinking about putting pipes in the forms so that they would just slide into each other when I want to join them.

I am thinking of adding perlite to the air crete.

I echo what William said I don't think you gain anything with perlite in aircrete.  The air is a better insulator and it does not melt like polite does at high enough temps.  Of course at those temps the cement may have disintegrated.

Are you using Darwin's hi temp formula?

Sincerely,

Ralph

Ralph Kettell wrote:

Mart Hale wrote:

William Bronson wrote: Cool!
I make perlite concrete, it cuts  this way as well.
I build in slabs and join them together.

Awesome...    

I have been thinking about putting pipes in the forms so that they would just slide into each other when I want to join them.

I am thinking of adding perlite to the air crete.

I echo what William said I don't think you gain anything with perlite in aircrete.  The air is a better insulator and it does not melt like polite does at high enough temps.  Of course at those temps the cement may have disintegrated.

Are you using Darwin's hi temp formula?

Sincerely,

Ralph

Well one of the ingredients for the formula ( there is multiple items) is a special kind of lime that I don't have here :-(    I emailed them and they said I could use a different type of lime but I am uneasy about that as his is proven, and I would be doing something he has not tested ......


Responses have been very slow back from Darwin when I email they are overloaded with so many responses.


My present two systems are working great with the aircrete and ceramic fiber.     I just want to encase the ceramic fiber in something to keep the fibers in    I am considering using the refractory mix and coating the fiber with it to seal it in....    Not sure if that is the direction I want to go.    I have used sodium silicate on it and it has bound it up very well.