Architecture: Building Materials

Colosseum

Roman concrete (opus caementicium)

Ancient Roman concrete is material mainly composed of water, chalk, and sand. Ancient Roman concrete was a changing recipe that varied to the needs of the structures built throughout the empire. Some of the concrete mixtures were composed of volcanic sand, small stones, broken brick, and limestone. The Romans had various recipes to make waterproof structures like bathhouses and aqueducts to create a non-absorbent concrete needed to make such waterproof structures.

Concrete enabled ancient Romans to think architecturally advanced compared to other civilizations at that time. The Ancient Romans were allowed to push the limits of structure from the typical brick and mortar buildings to domes and vaulted ceilings. Many of the concrete structures created by Ancient Rome had a very important ingredient called Pozzolana which was volcanic ash that was found at Pozzuoli near Naples.

Ancient Roman concrete gave the Ancient Romans an advantage because this allowed them to build structures that were less costly and buildings that did not require internal supports. Prior to the use of Roman concrete, the Romans were used to the typical post and lintel structures they learned from the Greeks and Etruscans. Lintel structures are load-bearing building components that were used to span over two vertical points with limited architectural properties.

 

bricks

 

Baked Brick

The Romans made fired clay bricks throughout the Ancient Roman Empire to build elaborate buildings. These bricks were made from Ancient Roman legions and citizens who operated kilns that were built throughout the empire. Many of the bricks were stamped with the legion’s mark that produced the bricks. In the middle of the 1st century BCE, Brick makers used unique stamps that had the name of the brickyard where the bricks were produced. Brick making reached its height of production and quality in the first century. Ancient Rome used bricks far and wide; in both the private and public constructions. The Romans took the skilled trade of brick making throughout the empire and even trained locals on how to produce bricks. This bricks ranged in size and shape. Many of the bricks were square, rectangular, triangular, and round; depending on the construction needs. Bricks also varied in size and height and length. Some Roman brick buildings had bricks as big as three feet in length. It should be noted that most Roman bricks were not as high as modern day bricks used in today’s buildings.

 

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