There are different types of cement: Portland and CSA (Calcium Sulfoaluminate).
https://caltra.com/wp/wp-content/uploads/2016/11/What-is-CSA...
Portand is the cheap stuff- like the $6 Quikrete bag at Home Depot. CSA is more expensive, but also available at Home Depot- look for the "Rapid Set" brand (Rapid Set Cement All is like $28 a bag).
It's kind of awesome, it's so fast you can sculpt vertically with it. You use more water with it than Portland, it starts out more mud-like. It tends to be preferred for repairs.