permaculture

["John Schinnerer" <john@eco-living.net>]

Aloha,

> ...do you - or anyone else on the list - have any
> experience with no-fines concrete? (as described by ken kern) it is
> supposedly doing a better job in insulation due to airspaces in it.

Not I - haven't heard of it.  There's also pumice-crete -

http://www.pumicecrete.com/

...using pumice (highly insulating) aggregate with a small amount of
cement for monolithic pour thick walls.  I plan to experiment with
"cinder-crete," since cinder is an abundant local resource in the area of
my property in Hawai'i.

Don't know anything much about woodcement either.

>in quite old austrian city houses
> (200 years +) i have seen old woodcement-floors - brown and glossy, very
> nice feel to them - without the bitumen though, it was up in a third
> floor, so damp insulation didnt matter. remarkably durable.

Might they be wood-clay, perhaps with lime?  When did what we know as
"cement" (e.g. portland cement) come on the scene?


John Schinnerer, MA
-------------------------
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Cultural & Ecological Designing
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