Topic (to be done on the blog):
- What are the key features? What shapes do you notice?
- How might they have been built? What materials were used?
- Many of the bridges still stand today. What do you think made the bridges strong?
Challenge: Can you find out what a keystone is and describe why it was important in Roman bridge construction?
Roman bridges, built by ancient Romans, were the first large and lasting bridges built. Roman bridges were built with stone and had the arch as the basic structure. Most utilized concrete as well, which the Romans were the first to use for bridges.
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REVANTH
Pont du guard and Alcantara Bridge
ReplyDelete1st question- Key features- Arches and Tiers
2nd question- Shapes- I notice arches / crescents and rectangles
3rd question- How the shapes were made- I think the arches/crescents were made with something with an arch shape and it was held over in to create the shape.
4th question- Materials- I think bricks and cement were used to create the bridge.
5th question- why is it still standing- I think this is because they used enough cement to hold the bricks for a long period of time.
Connection between cities, ports, mines and neighboring civilizations brought the need of creating stable and permanent roads. Their bridges were made out of wood logs & /or stones. These early bridge building efforts finally received massive update in Greece, where builders and mathematicians discovered new ways of molding the weight of bridge material into structures that could remain strong enough to carry incredible weights.
ReplyDeleteWith the arrival of Roman Empire, bridge building techniques increased in population with the introduction of arches. Rather than crudely covering entire surface below the deck of the bridge with the stone or wood, architects of that time built their bridges with the arching shapes, enabling downward force from the top of the bridge arch to meet the equal force that was pushed from the ground in the bridge foundations.
The Romans used a wide variety of materials ranging from chalk and sand through to pozzolanic concrete also metal and wood. I can see semi circles in the bridge.
ReplyDeleteI think that they some times needed to cut or curve the stone to make the biulding.
ReplyDeleteRoman Bridges
ReplyDeleteThere are many different Roman bridges, such as the Bridge of Apollodorus (Trajan's Bridge) and the Aleconétar Bridge.
The arch is very noticeable, and there are often two or more tiers on the bridge.
The bridges were probably built with bricks/stone and concrete. I think that the rest mans laid each brick on top of each other then created an arch shape.
The concrete that was used held the bricks together so if there was bad weather the bricks wouldn't fall. This made the bridges last for a long period of time.
Challenge:
The keystone is a wedge-shaped piece that goes at the top of an arch to keep all the others in place.
*Roman Bridges*
ReplyDeleteThe Romans built loads of bridges like Trajan's Bridge and the Aleconétar Bridge.
The arch stands out the most. They were built with bricks/stone and concrete.
The concrete they used would work underwater, so this made the bridges very stable.
Some bridges are - Trajan's Bridge,Karamagara Bridge, Constantine's Bridge, Alcántara Bridge, Pergamon Bridge.Roman bridges, built by ancient Romans, were the first large and lasting bridges built. Roman bridges were built with stone and had the arch as the basic structure. Most utilized concrete as well, which the Romans were the first to use for bridges. bridges, influenced by the ancient notion of the ideal form of the circle, often describe a full circle, with the stone arch continuing underground. bridges, influenced by the ancient notion of the ideal form of the circle, often describe a full circle, with the stone arch continuing underground.
ReplyDeleteRoman Bridges
ReplyDeleteI can notice that the bridge is made out of arches at the bottom, also that it has 3 layers to it. The Romans made these magnificent bridges out of a newly discovered material founded by the Romans that they called Concrete. They were designed to look like multiple overlapping arches. I think what made the bridges strong is that the 3rd layer was also used as a foundation for the bridge to ensure its was stable and safe, or else they would have to pay a wallet-emptying tax!(and now one wants that...)
On the bridge there are arches and it has 3 layers (the first two look the same but the third one is smaller). It was made of concrete which is probably why there are still some Roman bridges today.
ReplyDeleteMany Roman bridges were made out of stone and concrete. Their key feature is the arch, usually a semi-circle. It is the arch shape which makes the bridges so strong. The key-stone is the wedge-shaped stone at the centre of the arch. It locks the stones and makes the arch strong.
ReplyDeleteEsme
Roman bridges
ReplyDeleteThe Roman built loads of bridges like the Trajan's Bridge and the Aleconetar Bridge.
1 Arches and Tiers.
2 On a Bridge you can find arches, circles, cresents and rectangles (as shapes)
3 They used bricks, wood, stone and croncrete.
4 They used the arches and other shapes to keep the shape of the bridge and the bridge standing.
5 I think after they put the concrete on the bridge after it dried they would put a second coat of concrete around the bridge to keep it steady and stable.
ROMAN BRIDGES
ReplyDeleteThe Romans were the first people to invent bridges. The arches show out the most;the key feature. One of the most famous bridge was Trajan's bridge. The Romans made most of their buildings out of stone and concrete that include bridges. Each bridge had more than one layer that made it very strong.
Roman stone arch bridges were semicircular, with several being made in segmental form which offered greater protection from forces of flood waters and enabled builders to infuse less material into bridge itself, making it lighter. Yeah I think they put concrete on to keep the bridge stable and two more coats to make it stronger.
ReplyDeleteRoman Bridges
ReplyDeleteRomans were one of the first civilisations to use concrete to construct bridges. This made them strong, and so they lasted longer. Many still exist in the modern day world, e.g. Pons Aemilius Bridge, Pont Ambroix, Pont du Gard (pictured above) etc., and can be seen all over the globe, from France to Germany.
Typically, Roman bridges would be over 5 metres wide, and have a slight gradient. Also, they would have rustic work (a jagged stone face to imitate nature) and elaborate stone patterns, much like a brick pavement today - one vertical then one horizontal then one vertical etc. The stones would be joined with metal bars or dovetails, and there would be indents on the stone to hold on to.
Roman bridges would normally comprise a single or numerous arch(es), with rectangular pillars to separate them. Sometimes, there would only be one shape, which would be a semi-circular one.
To build a bridge, the construction workers and engineers would have to collaborate to make a wooden pattern of arches the exact size of the finished bridge. Then, they would replace it with stones, and attach them with their secret ingredient - mortar, a bonding agent that did not dissolve in the rain. The stones used were local, but the mortar had to be imported from far away.
Finally, they would take the wooden frame away.
The bridges lasted because of the structure - this came from the Etruscans, and was called the voussoir arch, which was extremely strong and durable because of the keystone. The keystone was a stone block which was kept suspended because it was compressed by two stone half-arches mortared onto two stone piers.
The key features of a Roman bridge are that they had strong arches, tall structures and new materials such as concrete. The main shapes in a Roman bridge are arches and domes. The bridges were built by cranes these were no ordinary cranes, men would pull ropes to lift things and they would push big pieces of wood around in a circle that were attached to the crane. The materials used for these bridges were bricks, concrete and wood. The arches made the bridges extremely strong.
ReplyDeleteRoman Bridges
ReplyDeleteWhat are its features?
• It is made of stone
• It contains arches
• It is firm and in place
• It sometimes used concrete
What shapes do you notice?
• It is built in arches rather with stone bricks piled together
• There are tiny square shaped gaps in places
How might the bridges have been built?
• a wood frame was first constructed in the shape of an arch
• Next, the stone work was built up around the frame
• Finally a keystone was set in position
Building materials:
• Sand
• Gravel
• Stone
• Concrete
• Wood
What made the bridges strong?
• The arch
• The strong materials like stone and concrete made it last for long
What is a keystone?
• A stone block in the middle of the arch to keep things in place
• It is very useful as it is hard for the other blocks to remain steady if the keystone isn’t steady.
Its made of sandstone gravel wood concrete.it contains arch.
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