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Arizona Concrete
Geology 101, Section 12262
According to the Mine Faculty at the University of Arizona, cement is
manufactured primarily from suitable limestone and shale rocks. Arizona had two
dry-process cement plants in 1969, namely the Arizona Portland Cement Company
plant in Pima County, near Tucson, and the American Cement Corporation plant at
Clarkdale, in Yavapai County (52-53).
The use of cementing materials goes back to the ancient Egyptians and
Romans, but the invention of modern portland cement is usually attributed to
Joseph Aspdin, a builder in Leeds, England, ....
Word count: 1308 - Page count: 5
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