Conference: building the pyramids of Egypt with artificial stones
https://www.youtube.com/watch?v=k0nOw_ebmGk
This does it for me. I keep reading more and more articles which debunk the theory of carved and dressed stones as buildin blocks for the pyramids.
No reason to dispute this theory. It answers all the questions that rule out the previous theories.
And as far as the lost technology of cement, we have ample evidence that it can happen. The Romans are acknowledged to have used cememnt extensively in their building projects—bit the technology was lost again until the rediscovery in the 1800s with Portland cement.
The use of the counterpoise mechanism called the shadoof would enable the builders to lift agglomerate from one level to another with very little manpower—and they were using this mechanism for lifting water from the Nile already.