The Great Pyramids of Giza - Evidence for Cast Blocks

The Great Pyramids of Giza - Evidence for Cast Blocks

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Microstructural Evidence of Reconstituted Limestone Blocks in the Great Pyramids of Egypt

M. W. Barsoum and A. Ganguly
Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104

G. Hug
LEM ONERA-CNRS, Chatillon Cedex, France

How the Great Pyramids of Giza were built has remained an
enduring mystery. In the mid-1980s, Davidovits proposed that
the pyramids were cast in situ using granular limestone aggre-
gate and an alkali alumino-silicate-based binder. Hard evidence
for this idea, however, remained elusive. Using primarily scan-
ning and transmission electron microscopy, we compared a num-
ber of pyramid limestone samples with six different limestone
samples from their vicinity. The pyramid samples contained
microconstituents (lc’s) with appreciable amounts of Si in com-
bination with elements, such as Ca and Mg, in ratios that do not
exist in any of the potential limestone sources. The intimate
proximity of the lc’s suggests that at some time these elements
had been together in a solution. Furthermore, between the nat-
ural limestone aggregates, the lc’s with chemistries reminiscent
of calcite and dolomite—not known to hydrate in nature—were
hydrated. The ubiquity of Si and the presence of submicron sil-
ica-based spheres in some of the micrographs strongly suggest
that the solution was basic. Transmission electron microscope
confirmed that some of these Si-containing lc’s were either
amorphous or nanocrystalline, which is consistent with a rela-
tively rapid precipitation reaction. The sophistication and
endurance of this ancient concrete technology is simply
astounding.

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The Great Pyramids of Giza - Evidence for Cast Blocks

by

Michel W. Barsoum
Department of Materials Science and Engineering
Drexel University, Philadelphia, PA 19014

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Comment:

If it's public knowledge, then it's a lie. Therefore truth cannot possibly be public knowledge in this time and age.

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Dictionary:

Giza
a city southwest of Cairo in northern Egypt, on the western bank of the Nile River, site of the Pyramids and the Sphinx; pop. 2,156,000. Also called El Giza ; Arabic name Al Jizah.

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