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When specifying concrete mix designs the fineness modulus of the coarse aggregate bulk volume can be selected. The fineness moduli for the coarse aggregate volume can be specifying by selecting Tools > GDMS > Concrete > Coarse Aggregate Bulk Volume..

 

The Coarse Aggregate Bulk Volume form will be displayed.

 

 

Maximum aggregate sizes can be added and removed using the buttons at the top of form.  Aggregate sizes can be specified in either millimeters or inches. For each maximum aggregate size the fineness modulus at 2.40, 2.60, 2.80, and 3.00 can be specified.