I've read on Living in Paper they have tested 3.01 per inch which is a mix that had sand in it. I'm thinking that would be the average range but thought I might ask if 3.5R or such is possible???
AIR entrainment is what will give the R value,sand and heavy additives will just offer mass..there is a trade off of 2' thick clay/adobe wall that soaks up sun, vs a 40" straw bale that keeps warmth in and cold out at R 50 both opposites.
the best of both is a fluffy papercrete very thick, but lightweight,where as water evaporates air pockets remain.
in the cement/concrete world adding the flyash and other air entrainment liquids ( to cause bubblers) lighten the cement and insulate better, again they seek the best of both.
i'd research how the cement/concrete makers do this for real info, as the PC world is all individual experiments without the serious, rigorous testing.
I've seen several articles on this type of insulating research online.
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Charmaine
Charmaine Taylor/Publishing & Elk River Press
PO Box 375 Cutten CA 95534
www.papercrete.com
Charmaine Taylor/Publishing & Elk River Press
PO Box 375 Cutten CA 95534
www.papercrete.com
Robert Heinlein (1907-1988) "There is no worse tyranny than to force a man to pay for what he does not want merely because you think it would be good for him." (Obamacare)
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