#11  
Old 11-02-2011, 05:58 AM
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Thumbs up Re: Floor insulation options because of a lack of materials

All sand is not equal as an insulator

If you must resort to 'sand', choose a coarse, highly washed sand, a sand without the smaller particles that would tend to fill the air spaces between the granules. The coarse sand will allow more air space for trapped air like texassourdough pointed out.
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Last edited by Lburou; 11-02-2011 at 06:02 AM.
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  #12  
Old 11-02-2011, 06:32 PM
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Thumbs up Re: Floor insulation options because of a lack of materials

You could always make a hearth like GianniFocaccia did (pictured below). Then, just fill the depression with scoria -or combination of sand and scoria- then, put your firebricks on top of the that. While not an optimal insulation layer, it would provide some trapped air for insulation and eliminate the cement issues you are struggling with. I'm still optimistic that you will find some form of vermiculite


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Last edited by Lburou; 11-02-2011 at 06:35 PM.
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  #13  
Old 02-14-2014, 11:58 PM
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Default Re: Floor insulation options because of a lack of materials

Quote:
Originally Posted by brickie in oz View Post
Hi Brickie,
I viewed the thermal conductivity list. I've just started a new thread regarding my project and have been looking for the insulation blankets and boards and could not find them in my area. I was surprised with the list showing some available materials with so good insulation:

Cotton 0.04: can I use normal cotton to insulate?
Coal 0.2: can I use the normal coal used for barbecues?
Chalk 0.09: can I use the normal chalks used at schools to write on the blackboards?
Sheep's wool 0.039: Can I use plain sheeps wool?

I started thinking: Why not use (grained) chalks for the hearth insulation and cotton for the dome?

Moreover. Local WFO builders recommended the use of glass or meal salt!! Is that reasonable?
Thank you
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Old 02-15-2014, 03:38 AM
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Default Re: Floor insulation options because of a lack of materials

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Originally Posted by v12spirit View Post



I started thinking: Why not use (grained) chalks for the hearth insulation and cotton for the dome?
What temperature does cotton burn?

Answer:

oil cotton - 120 C
cotton cloth - 210 C
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Old 02-15-2014, 10:15 AM
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Default Re: Floor insulation options because of a lack of materials

V12spirit,

I did a search for vermiculite and perlite in Syria. I found one company, Mihran that produces Syrian mined perlite. I see that they market it for "agricultural, construction, and insulation" uses. If you contact them, they may be able to help you find a distributor nearby.
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  #16  
Old 02-15-2014, 07:22 PM
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Default Re: Floor insulation options because of a lack of materials

Cotton and wool may burn if placed in direct contact with the floor bricks or inner dome walls. They may be ok further away from the heat. Likewise coal.

Chalk is a possibility but it attracts water really well and you might have to mug kids in school to get it which may impede their education unless there is a local quarry.

Salt turns to mush in really humid conditions.

Broken glass is not bad, it is the air spaces that create the insulation. It won't attract water and won't burn. Use broken bottles so the pieces will be curved to create larger air spaces.
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Old 02-15-2014, 07:54 PM
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Default Re: Floor insulation options because of a lack of materials

Thank you every body for your suggestions.
I would ask since broken glass is just for creating air spaces, Can one just leave the space between the dome and the walls empty?
What do you recommend regarding pumice and scoria?
Actually, because of the conflict in Aleppo, most manufacturers either closed or moved outside and are no longer available.

Last edited by v12spirit; 02-15-2014 at 08:06 PM.
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Old 02-15-2014, 09:47 PM
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Default Re: Floor insulation options because of a lack of materials

G'day
Why not try diatomaceous type products like kitty litter or the granular stuff used to clean up oil spills. It has been used in the past as insulation in agar stoves. Seems to tick the box for insulation and being non flammable. So it perhaps could be made with Portland as a binder as an insulator over the dome.
Regards dave
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Old 02-15-2014, 10:55 PM
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Default Re: Floor insulation options because of a lack of materials

Quote:
Originally Posted by v12spirit View Post
Thank you every body for your suggestions.
I would ask since broken glass is just for creating air spaces, Can one just leave the space between the dome and the walls empty?
What do you recommend regarding pumice and scoria?
Actually, because of the conflict in Aleppo, most manufacturers either closed or moved outside and are no longer available.
You could use just an air space but the problem is that the air in that space will move around and carry the heat with it. So preventing movement gives you a better outcome.
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Old 02-15-2014, 11:34 PM
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Default Re: Floor insulation options because of a lack of materials

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Originally Posted by cobblerdave View Post
G'day
Why not try diatomaceous type products like kitty litter or the granular stuff used to clean up oil spills. It has been used in the past as insulation in agar stoves. Seems to tick the box for insulation and being non flammable. So it perhaps could be made with Portland as a binder as an insulator over the dome.
Regards dave
Hi cobblerdave would you clarify this more?
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