How the pyramids where built in Egypt

http://www.geopolymer.org/cate... Are the pyramids made out of concrete, an artificial re-agglomerated limestone? Joseph Davidovits and the Geopolymer Institute crew shows that only few people is able to rapidly and easily produce several tons of pyramid stone blocks.

Author: kadamix
Length: 04:41
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Tags: block  bosnia  build  concrete  construction  davidovits  egypt  enigma  geopolymer  giza  kheops  limestone  mystery  pyramid  stone