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Mistertoy 06-26-2011 04:03 AM

Calcium Aluminate - Ciment Fondu
 
Think about using calcium aluminate homemade refractory mortar...

Does anyone know where to buy it in Brisbane ??


Thanks for your help
Brett

david s 06-26-2011 04:33 AM

Re: Calcium Aluminate - Ciment Fondu
 
Try total refractory management. They should have a calcium aluminate mortar ready mixed, but it will be way more expensive than the Portland, lime home brew mortar.

cobblerdave 06-26-2011 01:22 PM

Re: Calcium Aluminate - Ciment Fondu
 
dear Brett

I too looked into commercial types and too expensive. Used the home brew recipe and it works really well. Fireclay can be got from Dimore Brickworks for $30 a bag ( 1 and 1/4 used but sorry a mates got dibs on the remains) and the rest easy to get at the hardware. By the way I used washed sand by the bag (20kg) the type used for kids sandpits it made a finner mix which was easy to work with.

Regards Cobbler Dave

Johnny the oven man 06-26-2011 03:52 PM

Re: Calcium Aluminate - Ciment Fondu
 
try Kerneos on 0242722851, they make the stuff and should point you to a local seller.

chidding 06-26-2011 05:33 PM

Re: Calcium Aluminate - Ciment Fondu
 
I went for the premixed refractory option from SILA, picked it up at a pottery place in fremantle.. Yes it was $60 a bag, but at this stage its only going to take 2 bags to finish the oven. Which in the scheme of things isnt too bad.. I just figured i dont want to go through all this effort in building an oven, to have the mortar i made up myself go bad.

Choice is yours..

Mistertoy 06-27-2011 07:28 AM

Re: Calcium Aluminate - Ciment Fondu
 
I followed up Kerneos Australia today and they have referred me to Lyndons in Brisbane and I checked they do have Ciment Fondu

I have also done some searching and Kerneos is the new company which has evolved from the Lafarge company who originally patented and manufactured calcium aluminate cements. Kerneos has some data sheets that are good reading, one of the best one I found was:

http://www.cimentfondu.com/de/artisa...arConcrete.pdf

There is no mention of using lime which makes sense given the experience of others that have written on other forum threads about making home brew calcium aluminate mortars. So even though the pompeii plans indicate to use lime in the home brew calcium aluminate mortar, I think all the evidence says it is not required and I don't intent to use lime in mine.

Thanks
Brett

david s 06-27-2011 12:35 PM

Re: Calcium Aluminate - Ciment Fondu
 
http://www.cimentfondu.com/de/artisa...arConcrete.pdf

"There is no mention of using lime which makes sense given the experience of others that have written on other forum threads about making home brew calcium aluminate mortars."

They don't mention lime, but they do say you need to be meticulous to make sure there are no traces of Portland cement, which also acts as an accelerant. From my experience lime is way more effective in this regard, so eliminate it unless you want to mix a new batch every ten minutes. If it is really hot, as it may be by the time you get to starting your project, you can add chilled water to give you more working time.

Johnny the oven man 06-27-2011 03:35 PM

Re: Calcium Aluminate - Ciment Fondu
 
Quote:

Originally Posted by david s (Post 115916)
http://www.cimentfondu.com/de/artisa...arConcrete.pdf

"There is no mention of using lime which makes sense given the experience of others that have written on other forum threads about making home brew calcium aluminate mortars."

They don't mention lime, but they do say you need to be meticulous to make sure there are no traces of Portland cement, which also acts as an accelerant. From my experience lime is way more effective in this regard, so eliminate it unless you want to mix a new batch every ten minutes. If it is really hot, as it may be by the time you get to starting your project, you can add chilled water to give you more working time.

Dont tell anyone but...............................you can add sugar to slow down the set time on C/alum. cements.
And if you want to set it off quicker in winter............add Lithium Carbonate.

david s 06-27-2011 05:07 PM

Re: Calcium Aluminate - Ciment Fondu
 
I know cement mixers often carry a kilo of sugar in their trucks in case they get stuck and the load goes off. Apparently it is sufficient to stop the stuff going off at all. Johnny, how much sugar do you need to use and will it effect the end product ?

Johnny the oven man 06-27-2011 05:31 PM

Re: Calcium Aluminate - Ciment Fondu
 
Not much at all, 1 teaspoon is usually enough for a bag or two of castable.


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