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re: 25,000 cubic feet of stone
27 jul 2005
harry k wrote:
>you might try a search for mother earth news and 'slip forming'. there
>were several good articles on this technique by an old retired couple
>(can't recall their names)...
helen and scott nearing described their slip form stone wall technique
in their "living the good life" book.
how could we slip form a pyramid, with unshaped stone? a 48'x48'x48'
pyramid could be 100x75k/48^3 = 68% stone, with 742 ft^2 of 1st floor
space, 515 ft^2 on the 2nd, 330 on the 3rd, 185 on the 4th, 82 on the 5th,
and 21 on the 6th, totaling 1875 ft^2. the mercer house in doylestown pa
is close to this, with lots of small vaulted rooms built over dirt piles
that were later removed, in the 1930s. lots of interesting ceiling tiles,
laid on the dirt before the concrete. mercer often made huge bonfires
on the roof at night. nobody seems to know why.
with c = 0.16x3.75 million pounds = 600k btu/f of thermal mass and a
p = 192' perimeter and a 53.7' slant height and p/2x53.7 = 5152 ft^2
of surface, rc = 8765 hours (1 year) makes r = 75, eg 15" of foam.
hmmm... not so good.
how could we waterproof it for a few thousand years?
nick
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