GGU-SIEVE: "Identify soil type" group box

Preferences for the evaluation and visualisation of the test results can be defined in this group box in the above "Texts + table" dialog box.

• "Soil type to:"
  The soil type can be determined to the DIN 4022 or the EN ISO 14688-1 in the 2006 or 2020 edition. In addition, the soil types can be determined using the SEP (Schichten Erfassungs Programm) system of the Niedersächsisches Landesamt für Bodenforschung (Geological Survey of the State of Lower Saxony) or to ASTM (American Society for Testing and Materials).

• "Second soil type to:"
  You can visualise two soil types in the diagram table, for example to old and new DIN. Choose the standard for determining the second soil type here.

• Both input boxes are available in the editor box for each grain size distribution. However, the soil types are only shown in the diagram table if "Soil type" and "Soil type 2" have been allocated a table row in the "Edit texts and allocations" dialog box.

• "Consider principal soil types only"
  Normally, when determining the soil type, the program also gives the subdivisions for the sand and gravel ranges as fine/medium/coarse sand or fine/medium/coarse gravel. Activate this check box to suppress this function. Sand or gravel components are then summarised as one fraction in the soil type.

If you have made any changes here the "Determine soil type" button must be pressed again in the respective test number for existing grain size distributions.

• "Accessory soil types with ' and * for EN ISO 14688-1"
  If the soil types are determined to the EN ISO 14688-1 the accessory soil types can be further differentiated into slightly ( ' ) and heavily ( * ) by activating this check box. This is not provided for in the new standard but adds clarity.

• "Silt-sand boundary at 0.063 mm"
  The program determines the silt component at the silt-sand transition, which is 0.060 mm in the diagram according to DIN. If the final value is entered for the 0.063 mm sieve for a pure sieving, the transition to silt would not be reached and the program would not take the silt component into consideration when determining the soil type. By activating this check box, the silt content is determined at 0.063 mm. The graphic is adjusted accordingly.

• "Gravel-stone boundary at 63 mm"
  The program determines the stone component at the gravel-stone transition, which is 60 mm in the diagram according to DIN. The boundary transition is moved to 63 mm by activating this check box.