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The pyramids were not made of concrete. They were built from sandstone blocks and clad in limestone. and the stones were cut using stone tools, not copper. Copp
by om2 8y ago
The pyramids were not made of concrete. They were built from sandstone blocks and clad in limestone. and the stones were cut using stone tools, not copper. Copper is too soft for stone working but quite a few rocks are harder than sandstone.
- v_lisivka 8y agoQuote: The pair believe that the concrete method was used only for the stones on the higher levels of the Pyramids. There are some 2.5 million stone blocks on the Cheops Pyramid. The 10-tonne granite blocks at their heart were also natural, they say. The professors agree with the “Davidovits theory” that soft limestone was quarried on the damp south side of the Giza Plateau. This was then dissolved in large, Nile-fed pools until it became a watery slurry. Lime from fireplace ash and salt were mixed in with it. The water evaporated, leaving a moist, clay-like mixture. This wet “concrete” would have been carried to the site and packed into wooden moulds where it would set hard in a few days. Mr Davidovits and his team at the Geopolymer Institute at Saint-Quentin tested the method recently, producing a large block of concrete limestone in ten days. http://www.ce.memphis.edu/1101/interesting_stuff/pyramids_in_concrete.html http://www.ce.memphis.edu/1101/interesting_stuff/pyramids_in... https://www.geopolymer.org/archaeology/pyramids/are-pyramids-made-out-of-concrete-1/ https://www.geopolymer.org/archaeology/pyramids/are-pyramids...
- iand 8y agoThis is very far from accepted and is thoroughly refuted here https://www.researchgate.net/publication/288698728_Evidence_from_detailed_petrographic_examinations_of_casing_stones_from_the_great_pyramid_of_khufu_a_natural_limestone_from_tura_and_a_man-made_Geopolymeric_limestone https://www.researchgate.net/publication/288698728_Evidence_...
- v_lisivka 8y agoAccepted by whom? Information about ancient concrete and other types of cementation can be found in various books, e.g. [1]. I saw picture of cement klin (oven?, non-native speaker) in Peru, built more than thousand years ago, which looks _exactly_ like freshly build cement klin near to my home (Rivne, Ukraine), but labeled as "an ancient temple, filled with dirt". [1]: Lea's Chemistry of Cement and Concrete