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Re: GSBN:re: Exterior cladding question


Did you ever get a copy of the Guide to Compressed Earth Blocks: Testing
Procedures, from Craterre and CDE that we had for the ASTM Earthen
Materials Task Group I was leading a few years ago? Also there's the set
of New Zealand Earth Buildings Standards - three volumes - (NZS 4297-1998
Engineering Design of Earth Buildings; NZS 4298-1998 Materials and
Workmanship for Earth Buildings; and NZS 4299-1998 Earth Building Not
Requiring Specific Design)?

I have one spare set of these if you don't have them. Let me know.


>From:  ecobruce@...(Bruce King)
>Sender:    GSBN@...(GSBN)
>On Feb 10, 2005, at 8:44 PM, Catherine Wanek wrote:
>> Hi Chris & all--
>> One thing that has not been mentioned..... I understand that there is
>> usually about 9% cement added to compressed earth blocks, which makes
>> them
>> more durable to the weather and would also affect their permeability.
>> But how much, I wonder?
>Bruce King here, and so do I.  I'm about to start two different design
>and research projects, ie houses with experiments and monitoring on the
>side, using compressed earth blocks.
>In both cases, the owner also wants to start selling blocks, and both
>are in high seismic areas (Portland, Oregon and Nevada City, California
>(Sierra foothills).
>A recent visit with Tom Morton, a Scottish architect working with earth
>blocks, really convinced me that adding cement is not only sometimes
>unnecessary, but even detrimental to performance by several measures.
>Can anyone refer me to field experience and/or testing information
>(strength and durability, mainly) for compressed earth blocks without
>Bruce King, PE

David Eisenberg, Director
Development Center for Appropriate Technology
P.O. Box 27513, Tucson, AZ  85726-7513
(520) 624-6628 voice / (520) 798-3701 fax
<a  target="_blank" href="http://www.dcat.net";>http://www.dcat.net</a>

"Truly appropriate technology is technology that ordinary people
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that doesn't make them dependent on systems over which they have
no control."             John F.C. Turner