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Puente Romano, Mérida, the world's longest (still in use) surviving Roman bridge. The ancient Romans were the first civilization to build large, permanent bridges. [1] Early Roman bridges used techniques introduced by Etruscan immigrants, but the Romans improved those skills, developing and enhancing methods such as arches and keystones.
Roman concrete, also called opus caementicium, was used in construction in ancient Rome. Like its modern equivalent , Roman concrete was based on a hydraulic-setting cement added to an aggregate . Many buildings and structures still standing today, such as bridges, reservoirs and aqueducts, were built with this material, which attests to both ...
The longest steel reinforced bridge, in 2024, is the 600 metres (2,000 ft) Tian'e Longtan Bridge, Guangxi Zhuang, China. [8] The US's longest unreinforced concrete span, is the 200 feet (61 m) arch of the, 1910, Rocky River Bridge in Cleveland, Ohio. [9] Early extant examples include:
A timber bridge is a structure composed wholly out of wood, while a stone pillar bridge features a wooden superstructure resting on stone pillars. Strictly speaking, many bridges of the second type should be rather called " concrete pillar bridges", as the Romans preferably used opus caementicium for constructing their bridge piers (stone was ...
Roman bridges were among the first large and lasting bridges ever built. They were built with stone, employing the arch as basic structure. Most utilized concrete as well. Built in 142 BC, the Pons Aemilius, later named Ponte Rotto (broken bridge) is the oldest Roman stone bridge in Rome, Italy.
A bridge could be of wood, stone, or both. Wooden bridges were constructed on pilings sunk into the river, or on stone piers. Stone arch bridges were used on larger or more permanent crossings. Most bridges also used concrete, which the Romans were the first to use for bridges. Roman bridges were so well constructed that many remain in use today.
Modern concrete crumbles in decades, but the concrete Colosseum still stands — a mystery that puzzled scientists. 2,000 years later, ancient Roman concrete still stands — and experts finally ...
Roman bridges, built by ancient Romans, were the first large and lasting bridges built. [86] Roman bridges were built with stone and had the arch as the basic structure. Most used concrete as well, which the Romans were the first to use for bridges. Roman arch bridges were usually semicircular, although a few were segmental (such as Alconétar ...