sieve analysis of soil by dry method

Definition of sieve analysis of soil by dry method

The ratio of the mass of dry soil particles of the same sizes with a total mass of specimen in percentage measure by using the sieve of different standard sizes is known as a sieve analysis test.

Apparatus used in the sieve analysis

sieve analysis of soil by oven dry method

Thermostatically controlled oven

mechanical sieve shaker

mechanical sieve shaker

sieve analysis of soil by oven dry method mechanical sieve shaker

digital balance with readability 0.01 gram

sieve analysis of soil by oven dry method mechanical sieve shaker

set of sieves {sieve # 4, sieve # 10, sieve # 40, sieve #100, sieve #200 drying sieve }

Procedure for sieve analysis of soil by dry method

  1. Take a representative sample about 500 gm of soil, when soil contain larger particles (gravels), bigger soil sample will be required.
  2. If soil particles are lumped or conglomerated crush the lumped and not the particles using the pestle and mortar.
  3. Determine the mass of the sample accurately.
  4. Carefully check all the sieves and remove any particles sticking to the sieve mesh.
  5. Sieves are arranged in the descending order of their sizes with a pan at the bottom.
  6. Pour the soil from the top and place the cover, put the stack in the sieve shaker and fix the clamps, adjust the time on 10 to 15 minutes and allow the shaker to start.
  7. The sieving operation shall be conducted by the lateral and vertical motion of the sieves so as to keep the sample moving continuously over the sieve surface.
  8. The soil particles shall not be turned or manipulated through the sieves by hand.
  9. Sieving shall be continued until no more than 1-percent by mass of the residue passes any sieve for 60 seconds.
  10. Remove the sieves from the sieve shaker and carefully weigh the soil retained on each sieve.
  11. Remove the particles sticking to the sieve mesh and should be included in the weight retained.
  12. Tabulate the data and calculate the percentage passing as shown in the following table.

Mathematical Formulas

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Retained weight % = (Retained mass on individual sieve / Total mass of sample) x 100

Cumulative retained weight (%) = Total retained % mass up to the corresponding sieve)

Passing % = 100 – Cumulative retained mass % at respective sieve.

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sieve analysis calculation by dry method

Sieves SizesRetained weightRetained weight %Cumulative Retained weight %Passing %
#4
#10
#40
#100
#200
Pan

 

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