Poncebloc for J-tube?

Hey gang, the local hardware is selling 'poncebloc', which is made from pumice and concrete - claims to be fire-proof and insulating etc. Wondering whether it might be suitable for J-tube?

Shaun H. You actually have more information than we do ! Looks like someone didn't pay their bills, this leads me to suspect that this company ( Turkish? )
is not eager to take on the all powerful Portland Cement cartels !

So - can you share a little more information on Your location and who is handling this product ?!?

As our models slowly evolve we are pushing Burn Tunnel Temps of 2000ºƒ with the expectation that use of coal would push the Temps to 2400ºƒ

After the barrel of course we would not want to use insulating materials !

Hopefully Satamax can help us with translations and specs ! Otherwise mere speculation would quickly lead us astray ! For the Craft ! Big AL


http://www.poncebloc.com/wp-content/uploads/PonceBloc_Scie.jpg

Here's their promo video on youtube:

https://www.youtube.com/watch?v=MFJqZ4LddFc

I know pumice is a suitable insulator, but I've also read that cement tends to break up, so I'm wondering if in a burn tunnel these 'bloc's might crumble. If anyone thinks it might be suitable, I might go guinea pig and try it out. But I wouldn't want to go to the effort if someone has prior experience or knows how cement behaves in a burn tunnel?

The hardware store here only has one size of the block - rather large, for $4 a piece. I'd have to cut them to size, but the video makes out that you can cut it with a handsaw.

Here: http://www.cest-tout-vert.com/back/images_document/3101131000261532.pdf

They say "incombustible"

Which means it doesn't burn. But i'm not sure it would work with fire as hot as rockets.

Satamax : I agree! It is interesting that it appears that this is a Non Portland cement possibly even a geo-polymer and not as liable to fall apart, if so
it might make a decent bed or cradle for the insulating cocoon of perlight or vermiculite

Definitely more information is needed !

Shaun By law your dealer must be able to supply you with M.S.D.S. sheets, tho it may take a couple of days to get them faxed to them - please see
if you can get them to provide you copies ! For the Craft ! Big AL

Hi Can anyone tell me or point me in the direction of how to lay ponceblocs. I am not too sure what type of cement/glue to use and our hardware stores have no idea either.

Have you determined that ponceblocs are suitable for the 2000+ F inside a RMH combustion zone? If so, where did you get the info? There are people who really want to know.

Otherwise, you should probably use refractory cement for joining them, unless it is a temporary setup that you will want to take apart and reassemble. You should be able to find refractory cement at building supply or masonry supply stores in buckets ready to use, or 50 pound bags of dry mix.