On close examination, they found the Romans employed a hot mixing method and used quicklime in conjunction with, or instead of, slaked lime for producing concrete. Hot mixing, the team has now concluded, was actually the key to the super-durable nature.
How did the Romans build so good?
It used new materials, particularly Roman concrete, and newer technologies such as the arch and the dome to make buildings that were typically strong and well engineered. Large numbers remain in some form across the former empire, sometimes complete and still in use today.
What is the secret reason why ancient Roman concrete is so remarkably strong?
Plenty more when you look at the millimeter-scale bright white mineral features dubbed “lime clasts” embedded in the concrete. The team discovered ancient Roman concrete gets its strength from self-healing properties, which help fill in cracks as they form.
What was the Roman method of construction?
Opus caementicium (“cement work”)“Roman concrete” describes a category of building technology that involves the use of concrete. Concrete is defined as a heavy, durable building material made from a mixture of sand, lime, water, and inclusions (caementa) such as stone, gravel or terracotta.
Do we know the secret to Roman concrete?
Now, researchers say they have figured out why Roman concrete remains so resilient: Quicklime used in the mix may have given the material self-healing properties.
What Roman innovations in concrete allowed the builders of the Colosseum to do?
For example, the Colosseum used concrete, a material that allowed for lighter buildings, more efficient construction, durability, water resistance, the ability to span large spaces, and the ability to create forms through casting into complex forms.