Tuesday, September 4, 2007

[papercreters] Re: Mortar sprayer counter balance rig

Slurryguy asked what the project in the background is-- it is indeed an earthbag wall system
for a workshop space. The bond beam hasn't been put in place yet, and we're planning an arc
of a roof out of rebar, stock panels and stucco wire to be coated with papercrete/
paperadobe. The earthbags were used mostly because I'm fond of thermal mass but have
gotten less fond of blocks. Light weight papercrete blocks are fine, but heavy ones can fall
during an earthquake unless some other bonding system is used in addition to mortar
between the joints. The nifty thing about earthbag aside from thermal mass and no special
equipment or much cash outlay, is that it has passed code in parts of California due to its
earthquake resistance: it bends and sways, rolling with the punches but doesn't fail like a
brick or block structure would, though the stucco coat would have to be repaired. I'm not in
CA, I'm in AZ but we're overdue for another quake of the sort that destroyed many of the
local towns here a hundred years ago. About one every 80 to 100 years.


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