Roman cement

Galleria Vittorio Emanuele II. Ciment prompt

Roman cement is a substance developed by James Parker in the 1780s, and finally patented in 1796.

The name is misleading as it is nothing like any material used by the Romans, but was a "Natural cement" made by burning septaria - nodules that are found in certain clay deposits, and that contain both clay minerals and calcium carbonate. The burnt nodules were ground to a fine powder. This product, made into a mortar with sand, set in 5–15 minutes. The success of Roman cement led other manufacturers to develop rival products by burning artificial mixtures of clay and chalk.

单词	Roman cement
释义	Roman cement 英语百科 Roman cement Roman cement is a substance developed by James Parker in the 1780s, and finally patented in 1796. The name is misleading as it is nothing like any material used by the Romans, but was a "Natural cement" made by burning septaria - nodules that are found in certain clay deposits, and that contain both clay minerals and calcium carbonate. The burnt nodules were ground to a fine powder. This product, made into a mortar with sand, set in 5–15 minutes. The success of Roman cement led other manufacturers to develop rival products by burning artificial mixtures of clay and chalk.
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