Ready Mixed Concrete

On some jobs, such as large highway jobs, it is possible to use a batch plant that contains its own mixer. A plant of this type discharges ready mixed concrete into transit mixers, which haul it to the construction site. The truck carries the mix in a revolving chamber much like the one on a mixer. Keeping the mix agitated en route prevents segregation of aggregate particles. A ready mix plant is usually portable so that it can follow the job along. It must be certain, of course, that a truck will be able to deliver the mix at the site before it starts to set. Discharge of the concrete from the drum should be completed within 1 1/2 hours.