This standard specifies the requirements for manual, semi-automatic, and fully automatic concrete batching and mixing plants. It outlines the construction, performance, and calibration accuracy of material storage (bins/silos), weigh batchers, controls, and mixing equipment to ensure the consistent production of high-quality concrete.
Specifies requirements for concrete batching and mixing plants for preparing concrete.
Quick Reference Values
accuracy of weighing scales± 0.5% of full scale capacity
batching tolerance cement± 2%
batching tolerance aggregates± 3%
batching tolerance water± 3%
batching tolerance admixtures± 3%
Practical Notes
Routine calibration of load cells and weighing scales is critical to maintain the ±0.5% full-scale accuracy requirement.
Moisture compensation for fine aggregates must be dynamically adjusted in fully automatic plants to prevent fluctuations in the water-cement ratio.
Admixture dispensers should be cleaned and verified regularly; blockages here are a common cause of batch inconsistency.