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Opus caementicium was the Roman technique of constructing structures using concrete. It was used from the beginning of the Roman republic through the whole history of the Roman empire.
Additional recommended knowledge
Opus caementicium, like other forms of concrete, is made from a mix of aggregate and a binder which, when mixed with water, hardens over time. In Roman times gypsum and lime were used as binders, but volcanic dusts such as pozzolona (found in central Italy) were favored where they could be obtained. Reinforcing elements (such as the steel bars used in modern construction) were not used.
In most usage the raw concrete surface was considered unsightly and some sort of facing was applied. Different techniques were characteristic of different periods and included:
Opus caementicium roman walls
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Opus_caementicium". A list of authors is available in Wikipedia.|