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Re: [SPAM?] RE: GSBN:Re: Lime plaster problems -Hemp the answer



Paul,

In the great long list of materials I'd love to play with, rice hulls
figure highly. But unless somebody who lives a whole lot closer to a rice
paddy than I do sends me a bag full, it's not something I'd ever have
access to!

C

> Chris,
>
> In the place of hemp, have you ever considered using chopped rice hulls.
> They also contain a lot of silica.
>
> Thanks.
> Paul
>
> Paul A. Olivier
> ESR International LLC
> 27c Pham Hong Thai, Ward 10
> Dalat City
> Lam Dong Province
> Vietnam
>
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>
> -----Original Message-----
> From: GSBN [<a  target="_blank" href="mailto:GSBN@...";>mailto:GSBN@...] On Behalf Of
> cmagwood@...
> Sent: Monday, October 15, 2007 7:52 AM
> To: GSBN
> Subject: Re: GSBN:Re: Lime plaster problems -Hemp the answer
>
> I would concur that interesting and largely positive things happen when
> mixing lime with hemp! I make an oatmeally mixture of lime, gypsum and
> chopped hemp that makes an expanding (slightly) insulation for around
> windows and doors to replace the dreaded expanding foam that everybody is
> so fond of up here.
>
> The same mix works very well for making cordwood walls... the resulting
> mix is strong enough to be the bearing matrix and insulative enough that
> one can dispense with having to make an inner and outer mortar layer with
> loose fill in between.
>
> "Some chemistry" goes on between the lime and the high-silica hemp hurd
> that actually produces a mild bubbling/foaming action, making it the one
> mortar that swells slightly instead of shrinking.
>
> This summer I hope to use this mix as an insulative base under an earthen
> floor. We'll see what happens!
>
> Chris
>
>>
>> The best source of information on lime  is to be found through
>>
>> <a  target="_blank" href="http://www.buildinglimesforum.org.uk/";>http://www.buildinglimesforum.org.uk/</a>
>>
>> There are now related organisations in the USA and Scandinavia.
>>
>> Worth subscribing to their journal. There is a fantastic article in
>> the latest issue Vol 14 by Becky Little and Tom Morton
>> called "Mixing it with Lime and Clay"
>>
>> Maybe Tom Morton would send you a copy of the article if you ask
>> Contact him through his excellent web site.  Download the info he has
>> on unfired earth buildings
>> <a  target="_blank" href="http://www.arc-architects.com/";>http://www.arc-architects.com/</a>
>>
>> Been reading the responses about cellulose
>>
>> Hemp is the answer , Hemp-lime plasters/renders solve all  problems.
>> Doesn't shrink or crack, copes admirably with  moisture, etc. etc
>>
>> Just finished writing a guide to hemp-lime construction ( well
>> almost) yesterday . Should be out in April 2008 published by BRE/IHS
>> Press.
>>
>> Hemp web sites
>> www.hemplime.org.uk
>> <a  target="_blank" href="http://www.limetechnology.co.uk/pages/hemcrete.php";>http://www.limetechnology.co.uk/pages/hemcrete.php</a>
>>
>>
>> Tom Woolley
>>
>>
>> On 13 Oct 2007, at 00:44, MattsMyhrman@...:
>>
>>> In a message dated 10/10/2007 1:17:11 PM US Mountain Standard Time,
>>> andy@...:
>>>
>>>> Sometimes however lime plaster
>>>> was not used and rather a cow dung earth plaster was used followed by
>>>> regular coats of lime wash...though at the coast where we
>>>> experience strong
>>>> wind driven rains a lime coating was the norm.
>>>
>>> I believe that many of the cob buildings on the southern coast of
>>> England
>>> (Devon?) used several (maybe 4-5 initially) coats of lime wash.  It
>>> was
>>> considered somewhat sacrificial, and was followed up, after a year
>>> or two, with a
>>> couple more coats.  After that, another coat every couple of
>>> years.  Maybe Barbara
>>> Jones can check in on this  one, and also tell us whether lime wash
>>> over cob
>>> or earth plaster has traditionally been used anywhere in the
>>> British Isles
>>> where they experience driving rains coming in off the sea (up on
>>> the northwest
>>> coast of Scotland?).
>>>
>>>
>>> **************************************
>>>  
>>> 
>>>
>>>
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>>
>> Tom Woolley
>> woolley.tom@...
>> Rachel Bevan Architects
>> 17A Main Street
>> Saintfield
>> Ballynahinch
>> County Down
>> BT24 7AA
>> 028 97 512851
>>
>> also:
>> Graduate School of the Environment
>> Centre for Alternative Technology
>> Unit 7, Dyfi Eco Parc
>> Machynlleth
>> Powys, SY208AX
>>
>> 01654 703562
>>
>>
>>
>>
>>
>>
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