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[Cob] Cob R ValueShannon C. Dealy dealy at deatech.comMon Jun 20 23:19:53 CDT 2005
On Mon, 20 Jun 2005, otherfish wrote: [snip] > Robin Clarke wrote: > John > > I am not familiar with cob technique, except for a quick Google browse that > I have just done. Presumably walls made in this way have a density that is > around rammed earth and mud bricks, possible somewhere between the two. I > suspect that the fraction of straw is relatively small and that there is > some "ramming" of each layer. [snip] Just thought I should note here that while I think his general approach and premises are correct, at 10+% straw, I would consider the level of straw to be significant (though not overwhelmingly so), and the density of cob (due to this level of straw content) is definitely lower than mud brick, in addition, I don't think that the conventional method of manually "knitting" the layers together would really qualify as "ramming" in the sense that I suspect he meant. Overall, this would result in cob having a moderately higher R-value then his estimate. FWIW. Shannon C. Dealy | DeaTech Research Inc. dealy at deatech.com | - Custom Software Development - | Embedded Systems, Real-time, Device Drivers Phone: (800) 467-5820 | Networking, Scientific & Engineering Applications or: (541) 929-4089 | www.deatech.com
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