Answer:
The Column of Trajan was built with B- concrete and wooden forms.
Explanation:
The Column of Trajan is a Roman triumphal column that commemorates the victories of the Roman emperor Trajan in the Dacian Wars. It is located in Rome, Italy and stands at a height of 98 feet (30 meters) tall. The column was constructed between 106 and 113 CE and is made of Carrara marble. However, the interior of the column was not constructed of solid marble blocks, but rather a series of 20 large drums made of concrete and encased in marble. These drums were created using wooden forms and poured concrete, which was then faced with marble. The reliefs that cover the exterior of the column depict scenes from Trajan's victories and were also carved into the marble casing.