What kind of cement is being used for the freedom tower?

The One World Trade Center, commonly known as the Freedom Tower, primarily uses high-performance concrete designed for enhanced strength and durability. This concrete mix includes a combination of Portland cement, silica fume, and other additives to achieve the necessary compressive strength and resilience against environmental factors. The concrete used in the tower's core is particularly robust, allowing it to withstand extreme conditions, including potential impacts and seismic events.