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Sieve Analysis of Coarse Grained Soil

By: Haseeb Jamal / On: Apr 30, 2017 / Lab-Notes, Experiments, Soil Lab
 
 

Apparatus

A set of various sizes of sieves, balance.

Procedure

  1. Arrange different types of sieves in order of there decreasing size of opening.

  2. Find the total weight of the given soil sample and pour it in the top sieve.

  3. Place the set of sieves on mechanical shakers and shake it properly.

  4. Find the weight of soil retained on each sieve.

  5. Calculate percentage weight of soil passing through each sieve.

  6. Draw a grain size distribution/gradation curve.

Precautions:

 

  • During shaking soil sample should not b allowed to spell out.
  • All the readings should be noted carefully.

Practical applications

  • Grain size analysis gives an idea regarding the gradation of soil.
  • It is used to proportion the selected soil in order to obtain the desired soil mix.
  • It is also utilized in part of the specification of soil for air field’s roads, earth dams and other soil embankment construction.

Observations & Calculations:

Sieve no. Weight of soil retained on each sieve (gm) Percent weight retained Cumulative percent weight retained Cumulative percent passing
04 181.8 36.36 36.36 63.64
08 91 18.2 54.65 45.44
16 99.6 19.92 74.48 25.52
30 55.33 11.066 85.55 14.45
50 46.8 9.36 94.91 5.09
100 10.3 2.06 96.97 3.03
200 9.6 1.92 98.89 1.11
pan 4.8 0.96 99.85 0.15
Gradation Curve of Soil Sample
 

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