GGU-SIEVE: "Mix GSDs" menu item

A new curve can be created from existing grading curves, mixed from specified proportions of the existing curves. However, at least two pure sieving tests with identical sieve sets must have been entered. You will see the following dialog box:

You must first select the test in which the data for the new, mixed grading curve will be saved. Click on "New" if the original grading curves are to be retained. The program then automatically creates a new test. If 10 tests already exist, one of these must be selected in order to save the mixed grading curve.

Enter a weight for the new grading curve in the mixing dialog box above. This will be adopted as the "Dry mass (sieving)". Below this, the proportions of the original grading curves are entered. Portions of grain size distribution curves not to be included in the mix (GSD no. 3 in the example above) are set to zero.

The program identifies the mixed grain fractions and enters them in the sieving data for the selected GSD. To further edit the mixed GSD, click the menu item "Edit/Grain size distribution" and then the corresponding test button or double-click directly in the table area containing the required grading curve.