Sieve Analysis and PSD
geotechnicalParticle size distribution from sieve masses or percent passing, with the gradation curve, D10/D30/D60, Cu and Cc, and a USCS classification.
Sieve data
One sieve per line. Columns can be separated by spaces, commas, semicolons or tabs, so you can paste straight from Excel.
| Column | What it is | Example |
|---|---|---|
| 1. Aperture | Sieve aperture in mm | 4.75 |
| 2. Mass retained | Mass held on that sieve, in grams | 12.5 |
A line looks like 4.75 12.5
Drop a CSV or Excel file here, or
Read in your browser and put in the box below. The file itself is not uploaded.
9 sieve(s)
Options
Paste your sieve data and run the analysis
The gradation curve, characteristic sizes and USCS classification will appear here.
What this calculates
Cumulative percent passing from sieve masses (or direct percent passing), log-linear interpolation of the characteristic particle sizes D10, D30, D50 and D60, the coefficients of uniformity (Cu) and curvature (Cc), gravel/sand/fines fractions, and a Unified Soil Classification System group symbol and name. Hydrometer points extend the curve below the finest sieve, and Atterberg limits resolve the fines between silt and clay on the plasticity chart.
Method references
ASTM D2487 Standard Practice for Classification of Soils (Unified Soil Classification System); ASTM D6913 / AS 1289.3.6.1 sieve analysis procedures; Casagrande plasticity chart with the A-line at PI = 0.73 (LL − 20).