Geopolymer Research

This man,  Joseph Davidovits (https://en.wikipedia.org/wiki/Joseph_Davidovits) , theorizes the stonesof the great pyramid (and perhaps also some of the other monuments in Egypt and around the world)  where actualy cast like concrete.

https://www.davidovits.info/

Some interesting books he has on offer on the subject.

https://www.geopolymer.org/shop/cat/book/

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