Semir Osmanagich talks about the hardness of ancient concrete on the Bosnian Pyramid of the Sun
Semir Osmanagich talks about the hardness of ancient concrete on the Bosnian Pyramid of the Sun in a July 4, 2011 interview with Janet & Stewart Swerdlow.
"The concrete that covers the Bosnian Pyramid of the Sun is 2 to 3 times better quality than our modern concretes in the 21st century. And it's measurable. We make concrete [today] which is in the range from 10 to 40 megapascals. That's the hardness. And this concrete on the Sun Pyramid is from 67 to 134 megapascals. . . . They had a better knowledge of those natural materials. . . . They applied certain formulas that we lost . . ."
Semir Osmanagic
Original full-length interview:
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