[Strawbale] Searching for the Danish SB R-value testing results

[asbn]

Dear André

Here are the test-results in detail:

Danish
U-values from ?-values Measured for 385 mm straw parallel to heat flow, 75
kg / m3
Heat flow parallel to straw: ? = 0.057 W / mK
(source: http://www.baubiologie.at/download/jma_slides_halmhuse.pdf)

Tests made in Austria for “Haus der Zukunft”-project “Wandsystem aus
nachwachsenden Rohstoffen “, 1/2000 in detail:

MA39 Versuchs– und Forschungsanstalt in Vienna: ÖNORM-tests:
wheat-strawbale: density  90 kg/m3, ?10 dry= 0,0369, + 20%* = R-Value 0,0443
wheat-strawbale: density  100 kg/m3, ?10 dry= 0,0340, + 20% = R-Value 0,0408
wheat-strawbale: density  110 kg/m3, ?10 dry= 0,0337, + 20% = R-Value 0,0404

MA39 Versuchs– und Forschungsanstalt in Vienna: ISO-tests:
wheat-strawbale: density: 90 kg/m3, ?10 dry= 0,0380 W/mK
wheat-strawbale: density: 90 kg/m3, ?20 dry= 0,0394 W/mK
wheat-strawbale density: 90 kg/m3, ?30 dry= 0,0408 W/mK

*There is a 20% addition for moisture-sensitive materials, so we work with
?10 dry: 0,045 W/mK
(source for both: http://www.baubiologie.at/download/hausderzukunft.pdf)

Tests made in Austria for “Stroh Kompakt”, 8/2005
                        R-Value at 10 °C av. temp. ?10 W/mK
dry                    0,045 (Nennwert, for at least 90 % of the production)
23°C/50%         ? D(23/50) = 0,046
23°C/85%         ?10(23/85) = 0,050
(source: OFI Prüfbericht Nr. 10.125, Nr. 300.779 und Nr. 300.779-b)

kind regards
Herbert Gruber
-- 
asbn - austrian strawbale network
Österreichisches Netzwerk für Strohballenbau
3720 Ravelsbach, Baierdorf 6
Email: asbn at baubiologie...
http://www.baubiologie.at





> Hello,
> 
> I'm searching for the Danish SB R-value testing results. So I can
> compare them with the German, Austrian and French results. Other
> (serious) tests are also welcome. I'm particularly interested to know
> the lamda of SB tests in relation to the dry density that was tested.
> 
> What I've found so far (thanks to Bruno Jarno) is :
> Country  Dry density
>  (kg/m3)  Mesured Lambda (W/m.K)
> Germany  90  0,05
> Austria  100,8  0,05
> France  env. 70  0,07
> 
> 
> Sorry for those that are not on the metrical system (yet ;-). On René's
> Dallmeijers website http://www.strobouw.nl  you can convert lots of
> stuff : (click 'English' and then 'Technical')
> 
> Bye,
> André de Bouter
> www.lamaisonenpaille.com
> France
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