Concrete is a major constituent of infrastructure projects: mainly in real estate, roads and highways, railways, sea ports, airports, power plants, irrigation and urban modernisation sectors. Requirement of concrete for these construction projects has increased the use of concrete batching plants.
The concrete batching plants are normally classified as small, medium and large capacity plants based on the output/hr. The small capacity plant comes within a capacity of up to 20 cu m/hr. and medium capacity plants are usually between 30 to 60 cu m/hr. while the large capacity plants are between 90-240 cu m/hr. The capacity of the plants is determined by the capacity of the mixer, as normally they range from 0.35 to 3 cu m per batch.
A concrete batching plant can have a variety of parts and accessories, including: mixers (either tilt drum or horizontal or in some cases both), cement batchers, aggregate batchers, conveyors, radial stackers, aggregate bins, cement bins, heaters, chillers, cement silos, batch plant controls, and dust collectors.
The heart of the concrete batching plant is the mixer, and there are many types of mixers such as Tilt Drum, Pan, Planetary, Single Shaft and Twin shaft mixer. The twin shaft mixer can ensure an even mixture of concrete through the use of high horsepower motors, while the tilt mixer offers a comparatively large batch of concrete mix. A Pan or Planetary mixer is more common at a precast plant. Aggregate bins have 2 to 6 compartments for storage of various sand and aggregate (rocks, gravel, etc.) sizes, while cement silos are typically one or two compartments, but at times up to 4 compartments in a single silo.
Concrete batch plants can be portable, stationary, or semi-portable. Certain batch plant designs may be considered mobile, but not necessarily easy to set up and tear down.
These categories typically differ in the ease of startup and teardown and the presence of portable features such as axles, brakes, and lights. Mobile batching plants are typically a single unit, made up of a cement silo, an aggregate bin, an aggregate conveyor and the cement and aggregate batchers, but at higher hourly production capacities may require numerous loads for a single plant. Typically, a mobile batching plant can be dismantled and reassembled in a day or two. As a result, they can be used at multiple construction sites to reduce transportation costs. It allows the user to batch concrete at almost any location then move to another location and batch concrete. 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.
Today, the market is flooded with concrete batching plants with a wide variety of configurations from different original equipment manufacturers (OEMs).