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

[asbn <asbn@baubiologie...>]

Sorry, the ? was supposed to be lambda
Best wishes, Herbert

> 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 ³Haus der Zukunft²-project ³Wandsystem aus
> nachwachsenden Rohstoffen ³, 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 ³Stroh Kompakt², 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