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Discovery of Hydraulic Cement (4400YA)
Sun Aug 28, 2011 09:57

Discovery of Hydraulic Cement (4400YA)

It has been known for Millennia that the mixture of Volcanic ash or Tuff (siliceous), pulverized with lime, produces hydraulic (i.e. water-resistant) cement. Stonehenge builders removing such Bluestones from the Calcium carbonate (CaCO3) rich Q and R Holes (circa 2400 BC) discovered hydraulic cement.

Volcanic Ash (Tuff) in Ancient Construction


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