Old 06-13-2010, 03:58 AM
jota112233's Avatar
Join Date: Nov 2009
Location: Cardiff UK
Posts: 30
Default Thermal Ceramics - Tri Mor Monolithics Thermlite

I've been given 75 kilos of this stuff.

Here's some info on it.

These grades are used for the containment of heat within high temperature operating structure. They can be used for either hot face working linings or as backing linings behind higher density working linings


A versatile 1370C insulating material with low thermal conductivity. Can be installed by casting, gunning or trowelling.


Bond Type: Hydraulic
Raw Material Base: Calcined Fireclay/Perlite
Maximum Service Temperature: 1370C
Refractoriness (Seger Cone): 1460C (16)
Bulk Density Dried to 110C: 1440kg/m3
Net Material Required Cast (Gunned): 1350kg/m3 (1440)

Dried to 110C: 1440kg/m3
Net Material Required Cast (Gunned): 1350kg/m3 (1440)


Looks ideal for using underneath my hearth bricks, even if I do have to sieve out some of the bigger particles.

I guess my question is, does anyone think that this isn't suaitable for building my dome (between the firebricks)? It looks ready mixed, so not a lot of scope for bulking out with more sand, but maybe will add 1 to 2/3 of sand?

Should I test it first to see what it dries like between a couple of fire bricks?

Maybe I should just stick with the plan and go and buy a some fireclay and lime and make a homebrew?

Have just found it's components

Alumino Silicate 30 - 65%
Calcium Aluminium silicate < 35%
Cement > 20%
Clay 2 -15%

Is the cement content maxed out here. or will I get away with adding more sand?

What to do????
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Old 06-14-2010, 12:26 AM
david s's Avatar
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Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 5,156
Default Re: Thermal Ceramics - Tri Mor Monolithics Thermlite

This material is an insulating castable not suitable as amortar. However seeing you got it free you could try sieving out the courser aggregate and replacing the equivalent volume removed with fine silica sand. The active cement will be calcium aluminate which is fireproof, but be careful as it will have a shorter working time. Mix smaller quantities.
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Old 06-19-2010, 03:49 AM
Join Date: Jun 2010
Location: dublin
Posts: 32
Default Re: Thermal Ceramics - Tri Mor Monolithics Thermlite

Hi Jon, Just saw your layout picture and your problems with base size. Have a look at fxpose build where he cut the bottom rings to 3" to maximize his base area. In your case you would only have to cut the the bricks on the left and right of your dome. Good luck with the build.
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