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GSBN: Digest for 6/2/03

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-> Fwd: Re: Pictures and Lehm Leichtlehm data
     by Rene Dalmeijer rened@...


Date: 2 Jun 2003 12:29:49 -0500
From: Rene Dalmeijer rened@...
Subject: Fwd: Re: Pictures and Lehm Leichtlehm data

Guys trust a German to come up with numbers. Friedemann kindly sent me the 
following data.

>X-From_: mahlke@...Jun 02 18:28:22 2003
>Envelope-to: rened@...
>Date: Mon, 02 Jun 2003 18:27:13 +0200
>From: mahlke mahlke@...
>X-Mailer: Mozilla 4.78 [de] (Windows NT 5.0; U)
>X-Accept-Language: de
>To: Rene Dalmeijer rened@...
>Subject: Re: Pictures and Lehm Leichtlehm data
> >
> > >E-modules of earthen stucco? There is a "dynamische Elastizitaetsmodul"
> > >of 8000-8500n/mm2 for a loam with a high clay-content (University of
> > >Siegen, Institut fuer Bau- und Werkstoffchemie)clay content is usually
> > >somewhere between 20-30% for that sort of loam. for stucco you will need
> > >less clay, maybe 10-15% so the E-module should be not that high.
> >
> > Thank you are the first person to give me any data. Shows you if its not
> > measured or recorded in Germany then it is not available anywhere.
> >
> > I am anxiously awaiting your permeance data.
>water vapour permeability:
>usually you are working with water vapour resistance in Germany called
>Wasserdampfdiffusionswiderstandszahl mu (greek m), in combination with
>layer thickness s you will get the equivalent 'air film thickness' (in
>meter) an abstract value that alllows you to compare the tightness of
>different materials in different thicknesses.
>Loam has water vapour resistance of 6-8 (clayly loam 7, silty loam 6,
>sandy loam 7,5, loam plaster with a high clay content up to 10), lime
>plaster  about 10, concrete 70-150, cement plaster 15-35.
>To get your 'air film thickness' sd you need the product of m and s, i.e
>a wall of loam, 24cm has a sd-value of 7 x 0,24 = 1,68 m
>understandable? I hope that were the datas you were looking for. If not
>I will do my best to give you the right datas.
>- friedemann
> >
> > Rene Dalmeijer

Rene Dalmeijer


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