Concrete element

An artificial stone cast from loose aggregate (sand, gravel, small to medium rocks) bound by a reactive binder, e.g., lime or cement, in most cases set with water. In common usage, concrete refers to the combination of Portland cement, aggregate, and water.

Getty AAT: A hard, strong construction material comprising a mixture of sand, gravel, crushed rock, or other aggregate, held together, typically by a hardened paste of cement and/or lime. (AAT 300010737)