poozuolanas

Example:The ancient Roman engineer used pozzuolana cement to build the Colosseum.

Definition:A type of volcanic ash used in the production of concrete that sets strongly when mixed with water, named after a region in Italy known for its volcanic ash.

Example:Scientists studied the volcanic ash erupted during the 1980 Mount St. Helens eruption to create pozzuolana.

Definition:Fine, dust-sized fragments of rock, pumice, volcanic glass, and other materials that are ejected from a volcano during an eruption, capable of producing pozzuolana if processed.

Example:The mammoth bridge was constructed using hydraulic cement.

Definition:A cement that sets and hardens by reaction with water and is used in wet environments without deteriorating, such as pozzuolana.