Soil Cement

Sun May 4 16:27:31 CDT 1997

http://www.crest.org/efficiency/strawbale-list-archive/9608/msg00197.html
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<H1>Re: Soil Cement</H1>
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<em>To</em>: <A HREF="mailto:strawbale at crest.org">strawbale at crest.org</A> 
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<em>Subject</em>: Re: Soil Cement 
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<em>From</em>: M J Epko <<A HREF="mailto:duckchow at ix.netcom.com">duckchow at ix.netcom.com</A>> 
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<em>Date</em>: Thu, 15 Aug 1996 21:32:08 -0700 
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<PRE>
        Ken Kern, in the Rammed Earth chapter of his book The Owner-Built
home, writes:
        "As a result of adding 15 percent cement to a very fine, sandy-loam
soil, which is 74 percent sand, the strength of the wall increase[s] from
302 to 1,150 pounds per square inch... [snip] Cement is most economical in
soils containing 50 percent or more sand. With this proportion, about 15
percent cement should be used, whereas, with the more ideal proportion of 70
percent sand, only 8 percent cement is needed to achieve the same result.
With a 60 percent sand mix, about 12 percent cement should be added...
[snip] Cement seems to work best with sandy soils. Lime, either slaked or
unslaked, makes one of the best stabilizers for clay soils."


At 03:28 PM 8/15/96 -0700, you wrote:
>Does anyone have a good recipe for producing soil cement.  What I mean by 
>soil cement is: a mixture of a relativly inorganic soil, portland cement 
>and water. This method was described very briefly in The Straw Bale House 
>Book by Steen, Steen, and Bainbridge.  I would like to make batches of 
>200 lbs or less. Your help would be appreciated.
>
>Steve Morton


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