[Bob Ireland]

I watched the Davidovits video - I am stunned - a whole education in one fell swoop.

I had thought to mention in my earlier post about the old legend of using organic material acids to dissolve stone, but thought it would be off topic. Wow! Right on target... and then the main hurdle: what to use as a hardener {re-hardener}.

Well, shet mah mouf! A whole crib of corn there to be shucked. It certainly goes a long way to explain the grey andesite 'H' blocks with the perfectly squared detents; I still wonder how they built the molds and with what to still achieve perfect 90 degree rabbet indentations.

Thanks for the lead on 'geopolymer' technology; I still do not understand the name very well. :^/

[SunkenCiv]

Glad you liked it. He's been at this for decades, but it's mostly been obscure. Egyptology will have a chance to improve after Lerner and HAwass kick off.