It is noteworthy that within many of the blocks used to build the pyramid one can see entire fossils of shells and sea life. It is difficult to understand how these fossils could have survived the grinding up process used to create the slurry used in the creation of geopolymer stones.
In any block where you find a fossil embedded in the rock, you are definitely not looking at concrete. You are looking at an original block. It is easy to see fossils today in broken limestone blocks at the site of the Great Pyramid.
The geopolymer argument may be an answer to the scale of the great pyramid. 2 ½ million stones would have been easier to pour than to carry.
It is true that the majority of the great pyramid is made of limestone blocks of about 2 tons each. Even if the point is proved that the early Egyptians mastered a form of concrete (geopolymer) long before it was thought to be mastered by the Romans, there are still huge issues of how the Egyptians moved enormous stones. For example, in the heart of the pyramid you find in the King’s Chamber blocks of black granite blocks weighing 70 tons each. There are hundreds of these blocks. These blocks are definitely not the result of some sort of concrete (geopolymer) technology. We know exactly where these blocks came from. They came from quarries in Aswan, Egypt about 500 miles south of Giza.
So whether or not the ancient Egyptians were able to create limestone blocks using some sort of geopolymer technology, we still have to deal with the fact that they had to lift gigantic blocks of pure granite weighing 70 tons to heights of hundreds of feet above the ground and position them perfectly in place.
On Moving the Huge Granite Stones: Egyptologists want us to picture tens of thousands of people hauling blocks at the end of ropes. Human labor cannot haul a block weighing hundreds of tons, or even tens of tons, up a slope of over 10-degrees. If you want a 10-degree slope to reach 300 feet up to where the King’s Chamber is, then that ramp would need to extend back nearly a mile and would require more material in its construction than was involved in the creation of the Great Pyramid itself.