[Cob] length of straw etc

[Shannon Dealy]

On Thu, 12 Mar 2009, Dean Sherwin wrote:

[snip]
> it produces lactic acid which improves waterproofness.  There is
> probably little useful tensile strength once the cob is set  (which
> as we all know can be quite a while...)
[snip]

While I have certainly seen mixes where the straw provided little tensile
strength, I also have worked with mixes where the straw provided enormous 
tensile strength after the cob had completely dried (I break a lot of cob 
samples).  The specific materials and mix do make a big difference.

Shannon C. Dealy      |               DeaTech Research Inc.
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