[Manish Jain]

BATCHING AND MIXING PLANTS 
The principal functional elements of every stationary concrete production Plant comprises of the following

• Storage of materials Silos, containers and bins
  
• Batching arrangement
  
• Measuring and recording equipment
  
• Mixing equipment
  
• Control systems
  
• Electrical, hydraulic and pneumatic drives
  
• Conveying systems (belt / screw conveyors)
  

STORAGE OF RAW MATERIALS

CEMENT

Cement is generally stored in silos. The loading of cement is done with the help of pneumatic blower systems either installed on bulk carriers  or a separate system available at the plant. If baggage cement is used then the cement is loaded using a compressed air loader (See Figure 2) and a splitter unit. Cement is weighed separately, and is transported from the silo into a

mechanical or electro mechanical weighed by mens of a screw conveyor .

WATER

Water is generally stored in tanks located close to the plant. It is accurately measured by a water gauge and microprocessor controlled system.

The modern plants have new litronic MFM 85 moisture recorders . These recorders actually measure the moisture present in sand while the entire batch flows past. A recording unit calculates the average moisture value of the sand and passes on the information to the batching control unit to allow corrective action to be taken. The system operates to an accuracy of as low as 0.2% relative moisture.

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 MECHANISATION OF CONCRETING FD.pdf