Tabby concrete

A type of concrete using lime from burnt shell

Tabby is a type of concrete made by burning oyster shells to create lime, then mixing it with water, sand, ash and broken oyster shells. Tabby was used by early Spanish settlers in present-day Florida, then by British colonists primarily in coastal South Carolina and Georgia. It is a man-made analogue of coquina, a naturally-occurring sedimentary rock derived from shells and also used for building.

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