History of the Mobile Batching Plant

the mobile batching plant, also known as a portable concrete plant is a very productive, reliable and cost effective piece of equipment to produce batches of concrete. It allows the user to batching concrete at most any location then move to another location and batching concrete. It was invented in 1956 by Vince Hagan and was patented in 1966 as a convenient alternative to stationary batching plants that cannot be moved easily (U.S. patent #3,251,484). Portable plants are the best choice for temporary site projects or even stationary locations where the equipment height is a factor or the required production rate is lower.

25m3/h Mobile Concrete Mixing Plant

Parts of a Mobile Batching Plant

A typical portable concrete plant is a single unit that is pulled by a fifth wheel tractor.  Within this unit there is typically a silo for holding cement and/or fly ash, an aggregate bin and batcher, an aggregate conveyor and the cement batcher.   A water batcher can be included and some manufacturers also offer integrated dust collectors as well.

The silos for storing cement can vary in size from a couple hundred barrels up to 500 barrels [60 m3].  The silo can be divided to provide storage for both cement and fly ash.  The division does not have to be equal; it can 50%-50%, 60%-40%, or whatever is required.

A separate unit can be used to house an auxiliary silo for the storage of fly ash, potash, or additional cement.

Aggregate Bin Functions

The aggregate bin may or may not travel as part of the unit based on size and weight.  These bins can hold up to 150 tons of sand and aggregate (rocks, gravel, etc.).  The bin is typically divided into 3 or 4 compartments to allow various sand and aggregate sizes to be stored and released into the aggregate batcher in predetermined ratios.

The aggregate bin can be loaded directly with a front-end loader, but more often is loaded by one or more conveyors that are equipped with a hopper that can be loaded by a front-end loader.  These conveyors, also called stackers, can be designed to move side-to-side to allow a single conveyor to feed multiple bin compartments.  These movable conveyors are referred to as Radial Stackers as they pivot from their loading hopper.

The aggregate batcher is the hopper that measures by weight the sand and aggregate before it is transferred to the mixer or truck.  The batcher is supported on a series of load cells and is sized based on the plant’s published capacity and can typically range from 8 cubic yards [6 m3] up to 14 cubic yards [10 m3].

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