What Nourin reads in the sheet
- The liquid limit WL from the regression on the test points;
- The plastic limit WP and the plasticity index IP;
- The apparatus used: Casagrande cup at 25 blows, 20 mm cone (BS) or 17 mm cone (NF P94-052-1);
- The selected reference chart: Casagrande 1948, BS or ASTM;
What Nourin does with it
- Positions the soil relative to the A-line: IP = 0,73 (WL − 20);
- Gives the plasticity class and consistency state of the soil;
- Compares the values with the indicative ranges for the soil type and flags anything outside the expected range;
- Writes the interpretation comment, in French or English;
Nourin does not recalculate c, φ, E or γ from the limits: these parameters cannot be derived from an identification test. It reads what CiviLab measured and interprets it.
References
NF P94-052-1BS 1377-2Casagrande chart (1948)