Tuesday, December 05, 2006

A group of French and American scientists found the proof of ancient Egyptians using concrete when building pyramids. Supposedly, this technology was used at the upper layers of the buildings. The results of this research were published in French magazine "Science et Vie". The researchers analyzed the structure and limestone lattice of the milestones blocks, which had been used for building pyramids in Giza. It turned out that constructors used not only natural stone, but also blocks, witch were made of something like hydro mixture - artificially gotten grout, which was mixed with lime, ashes and salt. Outer looks of many of the blocks became the evidence In favor of this "concrete hypothesis". This theory first had been set up at the end of 1970's by the French chemist Joseph Davidovits. His researches were continued by the expert from French agency of aerospace researches (ONERA) professor Gilles Hug and scientist from Pennsylvania University Michel Barsoum. In order to discover the signs of the quick chemical reaction, which prevented natural crystallization, X-ray beams, electronic microscopes and plasma torch had been used. There is no explanation for this phenomenon for the natural stones, but it only verifies the artificial origin of these limestone blocks.