Weigh batching is the correct and preferred method of measuring concrete ingredients which leads to more uniform proportioning. Weigh batching is done in very important modern concrete batching and mixing plants.
Also Read: Why Batching of Concrete is Important?
Weigh batching system facilitates simplicity, flexibility and accuracy. Different types of weigh batchers available in the market and it depends upon the type of job. These types of equipment fall into three categories:
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01. Manual weigh batching
In manual batching weighing of all concrete ingredients is done manually. This system may be used for small jobs.
02. Semi-automatic weigh batching
In this system the aggregate bin gates are opened by manually operated switches and gates are closed automatically when the material has been delivered.
03. Fully automatic weigh batching
These systems have automatic microprocessor controlled batching arrangements. Not only the aggregates are batched in correct proportion but also their moisture content is automatically determined and necessary corrective action taken so that mix has desired consistency. This automatic equipment for batching is one of sophisticated and requires qualified and experienced engineers.These types of batching plant are mostly suitable for large and very important jobs like mass concreting.
In weigh batching the mix proportions are usually based on the 50 kg bag of cement and specified as 50 kg of cement to so many kg of sand to so many kg of aggregates.
Weigh batching has a great advantage as it gives good quality of concrete and providing more accurate and consistent mixture. Errors in batching of concrete ingredients lead to inconsistencies in quality.
As the strength and durability of concrete is largely dependent on the proportion of ingredients and water cement ratio, weigh batching is a must and recommended.