The Romans first invented what today we call hydraulic cement-based concrete. They built numerous concrete structures, including the Pantheon in Rome, one of the finest examples of Roman architecture that survives to this day, which has a 42-meter-diameter dome made of poured concrete .
Also to know is, what was the Roman concrete made of?
They found that the Romans made concrete by mixing lime and volcanic rock to form a mortar. To build underwater structures, this mortar and volcanic tuff were packed into wooden forms.
What was so special about Roman concrete?
Roman concrete, also called opus caementicium, was a material used in construction during the late Roman Republic until the fading of the Roman Empire. Roman concrete was based on a hydraulic-setting cement. Roman concrete is durable due to its incorporation of volcanic ash, which prevents cracks from spreading.
What materials were used to build the Colosseum?
were employed for the building of the Colosseum, all of them easily found or produced in the Roman area: first of all there is the travertino, a limestone, then tuff for the other pillars and radial walls, tiles for the floors of the upper storeys and the walls; finally, concrete (a.k.a. cement) for the vaults.