Batching of Ingredients of Concrete:

The measurement of different ingredients of concrete (i.e. cement, coarse aggregate, fine aggregate and water) for making concrete is known as batching. It is necessary to take accurate quantities of these ingredients so as to maintain the exact proportion of these ingredients as per mix design. The desired quantity of these ingredients can be measured by volume or by weight, which are respectively known as volume batching and weigh batching.

In case of volume batching of fine aggregates (i.e. sand), proper care must be taken for the bulking. Cement is always measured by weight in kg. Generally, the weight of one bag of cement is taken as 50 kg and volume as 35 litres. Water may be measured by volume (in litres) or by weight (in kg) as convenient.