Sv: [Strawbale] Thermo floor from snail-houses/mussels

[Lars Keller]

Dear Sven,

for the last 5 years we have been building floors pretty much like you write about below. But we do not add the cement milk.
Why do you ad it ?

yours sincerely
Lars keller

PS: I found your website v. interesting
~~

----- Original Message ----- 
From: SVEN AERTS <aertssven at mac...>
To: <strawbale at amper....muni.cz>
Sent: Friday, January 17, 2003 4:35 AM
Subject: [Strawbale] Thermo floor from snail-houses/mussels


> PRINCIPLE
> 
> 
>    |  |
>    |  | Chimney for airco in summer
>    |  |
>    |  |
> ///|  |//////  Floor U walk on + floor-
> +++|  |=====  concrete       | heating
> +++|  |+++++  metal grid reinforcing
> ===|  |=====  concrete  | the concrete
> ***|  |*****  PE-Foil
> AAA|  |AAXAA Mussels-Cement milk
> AAA|  |AAXAA Mussels-Cement milk
> AAA|  |AAXAA Mussels-Cement milk
> AAA|  |AAXAA Mussels-Cement milk
> AAA|  |AAXAA Mussels-Cement milk
> AAA|  |AAXAA Mussels-Cement milk
> AAA|  |AAXAA Mussels-Cement milk
> AAA|  |AAXAA Mussels-Cement milk
> AAXAAAAAXAAA Mussels-Cement milk
> AAXAAAAAAAXA Mussels-Cement milk
> 
> Mussel-thermo-floor as an isolating, carrying and durable
> supplement between the floor plate and the full ground, which replaces
> the basement and the use of heat-insulation-plates in an advantageous
> Manner.
> The distance between the shells (mustn't be mussel shells, better even
> snail-shells) caught in the net of cement-milk is going to be too wide for
> capillary effects to carry the ground water all the way up to the floor
> plate.
> 
> Thickness mussel-layer in cm     15     20     25     30     35     40
> 
> 
> Heatresistance         in m¾*K/W 1    1,33    1,67    2    2,33    2,67
> thermofloor
> 
> Heattransmission-
> coÎff. k               in W/m¾K    0,82    0,64    0,52    0,45    0,39
> 0,34
> thermofloor + 
> concrete layer 8 cm)
> 
> k=amount of heat transferred through the layer over a surface of 1 cm2 and
> per second at 1 K temperature difference between two sides of the
> total-thermo-floor.
> 
> 
> ADMISSIBLE FORCE  PRIVATE HOUSE CONSTRUCTION
> 
> Admissible static and evenly divided charge floor cover with a
> reinforced metal-grid/concrete plate of 7-9 cm thick, amount to estimated
> 3-4 kN/m¾, or a point charge of 2-3 kN on a randomly chosen basis of 10 cm x
> 10 cm.  The thermofloor can be charged with a not carrying wall of maximum 5
> kN per stretching meter. Carrying walls, chimneys, etc. must be built always
> on their own foundation.
> 
> Advantage: reduction of foundation building work: floor rests entirely on
> the mussel-layer - stabilised sand is superfluous.  Thanks to the larger
> thickness of the layer versus classical foundation techniques, the
> foundation's isolation factors are considerably increased.
> Low heat-conductivity - estimated at less than 0.12 W/mK.
> Results from air captured between the shells. A layer of 20 cm thick,
> generally the depth of the leveling, limit warmth losses with regard to
> not-isolated floors by 40 %. - thus limiting warmth losses but also raising
> the temperature of the floor, as a result of which the comfort raises and
> the danger for condensation reduces.
> 
> 
> CEMENT MILK
> 
> The composition of cement milk is as follows: 50 kg cement (CEM I 42.5) + 50
> l water give 65 l cement milk. During the processing cement milk must remain
> homogeneous.
> Stabilised layer cannot be tred upon before it has sufficiently hardened (in
> normal circumstances 24 up to 48 hours).  On top of that you need to foresee
> time for the top cement/grid/cement grid to dry.
> 
> These are the values I use in my calculatoins.
> --
> Respectfully Yours,
> 
> Sven AERTS
> Engineer for the People
> 
> Residential Address
>      Louizalaan 223 b 9
>      B-1050 Brussels
>      BELGIUM-EUROPE
>      GSM: +32 (0)485/389679
>      Email: aertssven at mac...
>      ICQ: 113835655
> 
>      For eco-techs & game for a better world, visit:
>                http://homepage.mac.com/aertssven
> -----------
> Have a nice day...
> 
> 
> 
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