[GSBN] Bale density

[martin hammer]

Thanks very much Herbert.  Are your numbers dry density (with the weight of
moisture subtracted) or actual density (as weighed)?


On 2/17/13 9:55 AM, "asbn" <asbn at baubiologie.at> wrote:

> I our old tests in Austria by Technical University of Vienna/GrAT the minimum
> weight for ideal thermal performance is 85kg/m3
> Since 2008 we have a new buildings-strawbale, which was tested ETA-10/0032
> with a minimum weight of 95kg/m3
> Germany starts with a minimum weight of 90kg/m3
> 
> here are the links to our tests in Austria:
> Wärmedämmleitwert-Überprüfung
> <http://www.baubiologie.at/download/zertifikate/lambda.html>  (first test
> 2002)
> http://www.waldland.at/de/waldviertler_flachshaus/strohdaemmung/produktspezifi
> kation/
> 
> tests in Germany by FASBA:
> http://www.baubiologie.at/download/Pb-lambda1.pdf
> 
> I all the tests we used wheat-straw
> 
> We use the certified (building)bales for non-loadbearing walls as well as for
> (a few) loadbearing walls
> 
>  
> regards
> Herbert Gruber
> -----------------
> asbn - austrian strawbale network
> 3720 Ravelsbach, Baierdorf 6
> Tel. 02958-83640
> asbn at baubiologie.at
> www.baubiologie.at <http://www.baubiologie.at>
> 
> 
>  
> 
> Am 17.02.2013 um 18:00 schrieb martin hammer:
> 
>>   Bale density  
>>  Hello all,
>>  
>>  Anyone care to weigh in (pun intended) on the minimum bale density for straw
>> bale walls?
>>  
>>  This is in the context of the most recent straw bale code proposal for the
>> International Residential Code.
>>  
>>  Things to consider:
>>  
>>  
>> * I¹m interested in the minimum acceptable density, not the optimum
>> * Densities from tested assemblies are especially useful (especially
>> structural tests) (please mention the test if this is the case)
>> * Include type of straw with your number(s) if relevant
>> * Dry densities are preferred (bale weight / bale volume, minus % moisture
>> content), but wet densities are ok if you also give the approximate moisture
>> content. 
>> * Lb/sq.ft. or kg/m3 are ok.
>> * Whether the minimum acceptable density should be different for structural
>> (load-bearing or shear wall) and nonload-bearing applications
>> *  
>> 
>>  (Note: I¹m aware that cutting the bale ties before plastering is a practice
>> some employ, at least for nonload-bearing walls.)
>>  
>>  Thanks!
>>  
>>  Martin Hammer
>>   
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> 
> 
> 
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