Castable Refractory Recipe

[koldenburg]

I found the following recipe online for castable refractory...

"By volume, it is 3:3:4 Portland cement:perlite:silica sand, mixed together thoroughly, then combined with 4 parts fireclay. The dry ingredients are then moistened to the texture of “stiff cookie dough,” packed into a form, and allowed to dry thoroughly before bake-out." This attributed to backyardmetalcasting.com.

Can anyone comment on if this is a workable mix for stove components?

[satamax]

So you're talking about

6% portland
6% perlite
8% silica sand
and
80% fireclay.

May be that works, since it's rather low on portland, and the rest of sand and perlite is fill.

If you want the real stuff, use perlite or corundum and "ciment fondu" (calcium aluminate cement) for example. Way tougher i think.

www.cimentfondu.com/gb/entreprises/PDF/FC_Ciment_Fondu.pdf


www.pipelinesupply.com/specsheet/Lafarge_Fondu_spec_Sheet.pdf

[koldenburg]

The real stuff looks ideal but appears as rare as hen's teeth. If some mix worked and I could get the materials locally that would be a huge advantage.

[satamax]

Hey Kolden. That's weird that you can't get ahold of fondu. Over here every materials supplier has some, and even pre mixed. Ask dem!

Kerneos Inc
1316 Priority Lane
Chesapeake Virginia 23324 - USA

Tel.: [phone]
Fax: [phone]

www.google.com/search?gs_nf=1&pq=ciment+fondu+in+usa&cp=12&gs_id=8&xhr=t&q=ciment+fondu&pf=p&sclient=psy-ab&safe=off&rlz=1T4ADFA_frFR472FR472&oq=ciment+fondu&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.&biw=1280&bih=553&wrapid=tljp134791870678100#sclient=psy-ab&hl=en&safe=off&rlz=1T4ADFA_frFR472FR472&q=calcium+aluminate+cement+home+depot&oq=calcium+aluminate+cement&gs_l=serp.1.1.0l4.0.0.1.4969.0.0.0.0.0.0.0.0..0.0.les%3B..0.0...1c.lczZ6zEqoNQ&pbx=1&bav=on.2,or.r_gc.r_pw.&fp=58db0629e5e8b3eb&biw=1280&bih=553

[Deleted]

Sept 17, 2012 10:46:41 GMT -8 satamax said:

If you want the real stuff, use perlite or corundum

Corundum (fused alumina) is no alternative to perlite.
Corundum is the complete opposite, as it is extremely hard and can conduct heat better than many kinds of steel.

[satamax]

Sept 18, 2012 2:20:45 GMT -8 @karl said:

Sept 17, 2012 10:46:41 GMT -8 satamax said:

If you want the real stuff, use perlite or corundum

Corundum (fused alumina) is no alternative to perlite.
Corundum is the complete opposite, as it is extremely hard and can conduct heat better than many kinds of steel.

Thanks Karl.

Well, i didn't say it was insulative, but fireproff that's for sure. Just passing on what i've read onto a french site about refractory "concretes"

www.fusiref.com/produits_mono_belcastl.php Tho, they say melted silica can do the job too!