For Chefren, same problem, the core is made of agglomerated stone, but this time... the granite... more easily ...was only for the casing of the firs… - Joseph Davidovits

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For Chefren, same problem, the core is made of agglomerated stone, but this time... the granite... more easily ...was only for the casing of the first and second steps that is made of ...blocks of granite that are split into two and are incorporated into ...the natural step.

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About Joseph Davidovits

(born 23 March 1935) is a French materials scientist known for the invention of chemistry. He posited that the majority of structural blocks of the are not carved stone but a form of limestone or man-made stone. He holds the .

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Major efforts were dedicated to greenhouse CO2 mitigation with the development of low CO2 geopolymer cements. My research... started in 1990 at Penn-State University... The production of 1 tonne of kaolin based-geopolymeric cement generates 0.180 tonnes of CO2, from combustion carbon-fuel, compared with... Portland cement... six times less. Fly ash based-geopolymeric cement... up to nine times less than Portland...

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[T]he priests of had long been adept at the art of making extraordinary cements. Cement found in... the Great Pyramid... is still in good condition. This ancient mortar is far superior to cements used in construction today. The modern used to repair ancient Egyptian monuments has cracked and degraded...

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