Using used concrete is nothing new.
However , I am not sure papercrete makes the best mortar. For all
intents and purposes used concrete chunks are just artificial stones.
I used to have pictures of a house built with rip-rap {concrete
chunks} in a slip form . All so for garden walls. It is quite pretty
when painted white and dramatically cheaper than natural or purpose
made synthetic stone.
In Houston `there are huge {multi-acre} piles of the stuff 40 to 60
feet high. Houston is the only major city in America more than 150
miles from a source of rock and tremendous quantities of rip-rap are
needed to shore up the banks of the bayous for flood control .
It is free to dump concrete , brick and tile at these places.
The large pieces are broken up , the rebar separated , and much of it
is crushed and graded for use as aggregate in new concrete and the
best road base for sub-tropical climates like the Texas Gulf Coast.
Of course it is extremely heavy which makes for a very good thermal
mass but the insulting advantage of papercrete makes them very
different products. If I was going to use concrete as stone I would
build a minimum 6" wall filled with rice hulls for insulation and use
the rock for the exterior. If the infill is not structural I would use
rice hulls in that situation as well. it is better insulation and much
cheaper to install labor wise.
http://www.coastalcrushed.com/
http://www.scctx.com/
--
Forrest Charnock
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