Total shipments of portland and blended cement in the United States and Puerto Rico in October 2014 were 9.6 million metric tons (Mt), up by 10 percent from the level in October 2013, according to the most recent USGS Mineral Industry Survey. Shipments for the year through October were 75.8 Mt, up by 8 percent from the same period in…
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Study Reveals Key to Longevity of Roman Architecture
A new study published in Proceedings of the National Academy of Sciences has made a key discovery to understanding the incredible strength and longevity of ancient Roman architecture. An international team of researchers analyzed the chemical composition of the volcanic ash-lime mortar used in the masonry of Roman architecture, and discovered that particular chemical reactions between its components give them…
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