[Strawbale] prefab strawbale (MR)...now BBB
Max Vittrup Jensen
max at permalot...
Thu Sep 17 22:08:06 CEST 2009
Great to hear your input Mark, and thank you for the links.
Michel, thank you for your lead to promote the little bit of scientific
research I was part of making! :o)
Here http://permalot.org/files/u2/BBB1228Final.pdf , you'll find a 7.
semester university paper with a Life cycle screening (Light weight
LCA), comparing 2 identical passive houses; one made of lime-sand panels
and styrofoam, the other made of big bales. There's also a complete
breakdown of costs in the attached excel sheet, which shows that the BBB
house cost 60% of the price of the other passive house. The central
outcome of the report is that it shows how the BBB indeed is
Co2-positive, and how bizarre the German concept of 'passive house' is,
as it typically uses more energy in the fabrication and destruction
process, compared to what it can save in a 50 year life-cycle...
Apart from that study, the only other one I'm aware off is a recent one
paid by FASBA; a compression test of big bales. It's on the new poster
series from FASBA covering their research the past many years (which
I'll recommend you all to invest in). Unfortunately it seem that the big
bale they used were not ideal in size and compression....and they're
apparently not going going for the EU wide certification which I wish
...Oh, Werner Smidth also had a compression test done on big bales,
however stacked flat (his prefered approach), and not on edge as the
German test, and the way to save on property taxes, as the walls will be
'only' about 75 cm thick with plaster; and 2 bales fit fine for height.
And for anyone interested in discussin more about BBB, I'll recommend
that we use the group for this at
PermaLot Centre of Natural Building
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