Geopolymeric products range from advanced materials to simple, yet highly sophisticated cements. The geopolymeric cements are made with inorganic che… - Joseph Davidovits

What about the Cheops pyramid? ...We have the core, this is the mass, more than 2 million tons ...made of ...reagglomerated limestone. But ...in the ...inner ...it is made of granite ...carved stone. Why? Cheops... is Khnum Kufu... agglomerated stone. However, Pharaoh is the king of the two countries. ...[T]he pyramids must be the representation of Egypt,... which means ...the replication of agglomerated stone for the northern part ....and in the south, natural granite that is the carving technology. So we have agglomerated limestone for the core, and the King's chamber is made of split granite that is dressed [cut] ...not carved granite.

[I]t is very difficult to translate a technical text... if you are not aware of the signification of the keywords. ...[I]magine that I got a text from Egypt that has been translated... [as] "make fluid stone with ashes insect in glass water"... what we have in reality is the description of, to make cement with fly ashes and water glass.

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...