On-site concrete mixing is possible. With the drum moving at a slow, agitated pace, the materials are batched into the truck mixer and hauled to the job site. The concrete is entirely mixed by the mixing truck once it arrives at the job site. This approach has traditionally been utilized for longer delivery times, but it is gradually losing favor with the recent introduction of modern set control admixture systems. 2. In the yard, concrete can be mixed. This is the most popular method of combining concrete from a transit mix facility. Before traveling to the building site, the drum is turned at high speed for roughly 70 revolutions at 12-18 revolutions per minute. This process allows the batch team to verify and correct the slump and air of the batch before leaving the plant by completing the mixing in the yard. While driving to the job site, the concrete is steadily disturbed. 3. Concrete can be mixed while being transported. While traveling to the job, the drum is turned at a medium speed, then slowed to an agitation. This saves on gasoline, drum wear, and concrete overmixing. It does not, however, allow the operator to inspect the cargo before leaving the facility thoroughly. Central Mixed Concrete – A stationary, plant-mounted mixer mixes the concrete before it is discharged onto a truck mixer in central-mixed concrete batch facilities. Wet-batch or pre-mix plants are other names for central-mix plants. Non-agitating haul units, such as dump trucks, can also transport concrete from a central mix facility (typically over short distances). Central mixing has several advantages, including faster batching and less wear on the truck mixer drums. On the other hand, Central mix plants can be more expensive to buy and maintain than transit mix plants..