Figure 4-2. Hand mixing concrete.
Machine Mixing and Delivery
The methods of mixing and delivering concrete ingredients and the types and sizes of equipment available vary
greatly. Power concrete mixers normally produce one batch about every 3 minutes, including charging and
discharging. Actual hourly output varies from 10 to 20 batches per hour. A mixer's cubic-foot rating usually
reflects the number of cubic feet of useable concrete that the machine mixes in one batch, except that most mixers
can handle a 10 percent overload. The stationary 16-cubic-foot mixer and the M919 concrete mobile mixer (see
Figure 4-3) unit are table(s) of organization and equipment (TOE) in engineer construction battalions and are
well-suited for troop construction projects.