Pozzolana

Pozzolana’s discovery may be thought of one of the extraordinary steps into the progress of ancient constructions product of concrete. Although its development is typically attributed to the Romans, its use is seen in earlier works throughout the X sec. by Phoenicians and Israelites largely in hydraulic constructions.

In effect, the potable water tanks engineered by King Salomon in Jerusalem were protected by an external material made of the Pozzolana lime. However, the role of the Romans is vital because they utilized pozzolana rationally and perpetually, subbing the natural sand with this Pulvis Puteolana The Colosseum , typical of the area around Pozzuoli (that is additional the origin of the name itself Pozzolana).

The Romans were able to grasp the peculiar consistency of pozzolana, this volcanic ashes that combined with lime would create a new texture able to become hard underwater and thus be useful in constructions designed to carry/conduct water itself.  The Romans discovered that pozzolana was invariably present in areas around inactive volcanos not simply in Italy but throughout the emperors and its ability to be combined with baked clay in different forms – such as tiles, bricks. In most of their works, the Romans utilized concrete to fill the spaces between bricks or stones.

Two major Romans’ constructions made of concrete are incredibly noted because they are still intact and which proves the durability of the used materials during its completion: the Pont Du Guard in Nimes, France, and the Pantheon in Rome which are respectively a hydraulic engineering work and an architectonic construction.

pont-du-gard

The Pont Du Guard in France was a part of a water conduit about 50 Km long that was carrying water from the city of Uzes to Nimes.

pantheon

The Pantheon in Rome, it is not only an architectonic masterpiece well-known worldwide for its perfection and wonder but also because it is one among the oldest constructions left to us today to admire from the Romans’ culture.

The Pozzolana

 

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