[Strawbale] NIST data on insulation properties (fwd)

Jan Hollan jhollan at amper....muni.cz
Fri May 10 21:53:14 CEST 2002

I have perhaps discarded the message when it came from the list, but I am
afraid it did not come at all. Anyway, it's not in the old archive, as it
should be. So I'm reposting it to the new list, the link to the NIST
database is important and should be findable by robots in the archive.


---------- Forwarded message ----------
Date: Sat, 20 Apr 2002 19:50:52 +0200 (CEST)
From: Jan Hollan <jhollan at amper....muni.cz>
To: Hannes Hohensinner <hohensin at mail....tuwien.ac.at>
Cc: strawbale-l at eyfa...
Subject: NIST data on insulation properties

(for NIST data on straw, see below)

Hi Hannes, 

your remark on that detail of clay plaster ``damage'' (I guessed it to be
a place, where non-participants of the workshop have been shown the layers
of the plaster the next day) on one of my photos within
 is so extraordinary, that I sent it already to Czech mailinglists and I
have to repeat it in this English-written one as well... I regret people
who don't read German, this is one more reason to learn it:

> Hallo Jan,
> Ich habe mir Deine Fotogalerie angesehen und dabei das Foto der Lehm
> verputzten Wand vom Workshop am Donnerstag mit dem vermeintlichen Bauschaden
> gesehen. Dieses kleine Loch im Verputz ist nicht grundlos gemacht worden.
> Ich habe es machen müssen, um meinen Ehering wieder zu bekommen, den ich
> beim Verputzen mit den bloßen Händen am Vortag genau an dieser Stelle
> verloren habe. Zum Glück hatte ich bei der Suche nach dem Ring die
> Unerstützung eines Archeologen, der mit einem Metalldedektor ausgestattet
> war. Ohne dessen Hilfe, wäre der Ring wahrscheinlich noch immer in der Wand.
> Soviel zum Grund des Bauschadens.

> Ich wollte dich noch bitten, ob du mir die Webseite der Normungs und
> Standardisierungs Institution in Paris schicken könntest, die bereits in den
> 50iger Jahren die Dämmwerte von Strohballen und anderen Naturdämmstoffen
> ermittelt hat.
> Vielen Dank und liebe Grüße
> Hannes

A plenty of measurements of insulation properties of most various
materials are available on the NIST server, so not in France, but in the
USA. The database is 
 -- just give ``straw'' as a material and three results from 1949 (!) will
appear (two for a standard winter case, one for a sauna perhaps). The only
missing value is the bulk density, perhaps it has been a bit lower than
that needed to get conductivity below 0.040 W/(m.K). But still, 0.045 is
good enough!

My favourite URL for NIST is this one:
   Linkname: The NIST Reference on Constants, Units, and Uncertainty
        URL: http://physics.nist.gov/cuu/index.html
 -- unlike the commercial BIPM in Paris, they give a lot of very useful
information to all the world, God bless America!

schöne Grüße,

 I started searching the URL anew (I tried some months ago already,
unhappy that don't see this important reference in my lynx bookmark
files) by giving a string 
  thermal conductivity 
 and interesting results appeared, but then I decided that I perhaps have
 the URL stored somewhere and found it by grep in my netscape bookmarks, 
  grep -i NIST .netscape/bookmarks.html
 fortunately. Thanks to your question following my remark on the
gathering, I found it again...

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