Yes, I know. The right proportioning of ingredients to be mixed for preparation of concrete is called batching of materials for concrete production.

Types: Volume Batching and Weight Batching.

Weight Batching is preferred due to following reasons.

1. Correct method
2. Provide accurate ratio of constituents as per design on the basis of specific gravity of materials.
3. Moisture content presence in the aggregate should also be considered while batching. In case of fully automatic weight batching it can be considered but volume batching is not suitable in such cases.
4. Compressive strength of same concrete mix at 7 days and 28 days is higher for weigh batching concrete mix than volume batching concrete mix.