Interesting thread. S&F (and bookmarked).
I recall reading a while back that one of the Great Pyramid's limestone blocks which had cracked was
found to have a human hair trapped within its matrix. Unfortunately I cannot recall where I read this but perhaps someone can find the reference.
However, according to a report by the National Science Foundation, 5 years of research by Professor Michel Barsoum of the Department of Materials
Science and Engineering at Drexel University, tend to support the idea that some of the limestone blocks were made of a geopolymer mix. Rather than
quote bits and pieces of the report I'll just give the link to it for anyone to peruse. (Also at the moment I can't recall how we correctly
quote from an external source on ATS these days.)
So, here's the link to the NSF's report entitled The Surprising Truth Behind the
Construction of the Great Pyramids
. (The OP has referenced to Prof Barsoum but as this link gives another source for reference I've mentioned
Regarding the logistics, I don't see it as such a great problem as some might suggest. The materials may well have been transported to where the
mixing was to be done and then poured directly into the molds. When doing concrete work I have found it easier to mix near to where I want to use the
stuff rather than cart the slurry many yards. Such was the case when pouring the floor for a second story at a friend's house. We didn't use
concrete pumps; we moved everything up to where it was needed then did the mixing and pouring right there.
If the Egyptians had used some kind of additive to accelerate the hardening of their mix then that would have been helpful but it wasn't essential.
If not mixed in situ, they could have moved the slurry in wooden or even woven buckets (suitably lined) if needs be. They had ropes and basic pulleys
so it's not like they had to build great long ramps for the purpose if they were moving smaller, more manageable amounts of material at one time.
They could even have used ladders or crude scaffolding and carried the stuff upon their backs, as is still done in some parts of the world when they
build higher structures. However, even if they used ramps, they would more likely run them around the pyramid's levels rather than have a single ramp
that stretched off into the distance.
As to the argument that there are unfinished carved obelisks nearby, I don't see how their existence is supposed to deny the possibility that some of
the Pyramid's blocks were made from a mix of prepared materials. The presence of one type of building or construction technology does not mean the
non-existence of others. There are buildings in my own city here that are made partly from bricks and concrete, but which include carved stone as
well. And I don't recall the OP saying that the Great Pyramid was made entirely of man-made, cast blocks, only that there is evidence that some of
the blocks were not quarried, but were made from a mix. The evidence seems to suggest that this was the case, and I for one have no problem with that.
Edit to add: how they managed to dress and then position the huge granite slabs is still unknown. But their existence still
doesn't deny the
evidence that some of the "limestone" blocks were man-made. Maybe they had access to knowledge or techniques that have been lost to us, or had some
"outside" help. I dunno, but all the same it's something that has fascinated me for over 40 years since I first started reading up on the Great
Pyramid when I was a kid.
[edit on 3/10/09 by JustMike]