1. Oven dry the given soil sample passing 4.75 mm IS sieve.
2. Take 200 g of oven dried soil sample. Mix the sample with distilled water to form a slurry and allow it for soaking.
3. Wash the soaked soil sample through 75 micron sieve until the water passing through the sieve is substantially clear.
4. Dry the fraction of the soil retained on 75 micron sieve in oven.
5. Arrange the remaining sieves one above the other such that 2mm sieve is at the top and 75 micron sieve is at the bottom. Place a cover at the top and receiver at the bottom.
6. Fix the set of sieves to the mechanical sieve shaker. Operate the sieve shaker for a minimum of 10 minutes.
7. Carefully collect and record the mass of the soil fraction retained on each sieve and also in the receiver.
8. Calculate the cumulative mass of soil fraction retained on each sieve. Calculate the percentage finer.
9. Plot a graph of percentage finer (along y-axis) Vs equivalent particle diameter in mm (along x-axis in log scale). Draw a smooth curve encompassing the plotted points.
10. Record the values of percentage sand, percentage silt and percentage clay size fractions from the graph.
11. Record D10, D30 and D60 from the graph.
12. Calculate coefficient of curvature (CC) and coefficient of uniformity (CU).
13. Classify the soil based on gradation.