A cement pump is a mechanical device used to move quantities of liquid concrete to different locations. Most often, cement pumps are referred to as “concrete pumps” because they actually pump concrete, which is made up of cement, and other materials such as water, sand, and gravel. There are three basic types of cement pumps, the boom pump, the line pump, and the special usage pump; which pump is used usually depends on the location of the job site and amount of concrete needed. A cement pump can usually be rented by the hour or day from companies that specialize in concrete.