Perhaps the most astounding thing is that even today our concrete isn’t nearly as durable, despite modern inventions such as reinforcing with rebar. Reverse-engineering ancient Roman concrete ...

So, the team tested their findings by making pozzolanic concrete from ancient and modern recipes using quicklime. They also ...

So, the team tested their findings by making pozzolanic concrete from ancient and modern recipes using quicklime. They also made a control concrete without quicklime and performed crack tests.

Concrete was one of the many inventions by the Ancient Romans. Previous studies have found it to contain three ingredients: lime, volcanic ash and water. It played an important part in Roman ...

Our sundial consists of an engraved, concave hemisphere carved into poured concrete, at the center of which is a vertical pin to cast the shadow. To build this sundial we needed to first make a mold ...