Proportioning of Aggregates:

After fixing the water-cement slump, ratio and nominal size of aggregate, the next step is to determine the economical proportion for coarse and fine aggregates.

The techniques adopted for proportioning of aggregates are arbitrary method, fineness modulus method, voids method, etc.

Determining the Quantity of Cement Paste

This step consists of preparing a number of batches of combined aggregate in fixed proportions. In every varying, batch quantities of water-cement paste having fixed water-cement ratio are added to get the required slump.