Search results
Results From The WOW.Com Content Network
The Romans first used hydraulic concrete in coastal underwater structures, probably in the harbours around Baiae before the end of the 2nd century BC. [12] The harbour of Caesarea is an example (22-15 BC) of the use of underwater Roman concrete technology on a large scale, [10] for which enormous quantities of pozzolana were imported from ...
Cement was made of hydrated lime (calcium oxide) mixed with sand and water. The Romans discovered that substituting or supplementing the sand with a pozzolanic additive, such as volcanic ash, would produce a very hard cement, known as hydraulic mortar or hydraulic cement. They used it widely in structures such as buildings, public baths and ...
The first use of concrete by the Romans was in the town of Cosa sometime after 273 BC. Ancient Roman concrete was a mixture of lime mortar, aggregate, pozzolana, water, and stones, and was stronger than previously used concretes. The ancient builders placed these ingredients in wooden frames where they hardened and bonded to a facing of stones ...
Pont du Gard (1st century AD), over the Gardon in southern France, is one of the masterpieces of Roman technology.. Ancient Roman technology is the collection of techniques, skills, methods, processes, and engineering practices which supported Roman civilization and made possible the expansion of the economy and military of ancient Rome (753 BC – 476 AD).
The Ostia dome was 60 Roman feet wide and made of brick-faced concrete. [61] [62] No later dome built in the Imperial era came close to the span of the Pantheon. [63] It remained the largest dome in the world for more than a millennium and is still the world's largest unreinforced concrete dome. [64] Ruins in the Piazza D'Oro at Hadrian's Villa
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
It is a form of Roman concrete (opus caementicium), the main difference being the addition of small pieces of broken pot, including amphorae, tiles or brick, instead of other aggregates. [1] Its main advantage over opus caementicium was that it is waterproof, the reason for its widespread use in Roman baths , aqueducts, cisterns and any ...
The hand-count rule was passed on Sept. 20 by a pro-Trump conservative majority of Georgia's election board, who said they were attempting to make the Nov. 5 election more secure and transparent.