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PRACTICAL 1 Sieve Analysis Test GROUP B

3.

D10 = 0.24 mm (effective particle diameter)

D30 = 0.34 mmD50 = 0.56 mm (mean particle diameter)

D60 = 0.70 mm

4.

5.

()

()

These results for Cu and Cz show that the sample is poorly graded as Cu < 4 and

and Cz is not 1 < Cz < 3. From the graph it can also be gained that the sample is

uniformly graded.

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6.

% of fines (particles smaller than 0.075 mm) = 0.08 %

Since, % fines < 50 % , it is a Coarse-Grained Soils ( Sand S or Gravel G)

% of coarse (particles larger than 0.075 mm) = 99.92%,

% of particles smaller than 2.36 mm = 91%,

% coarse fraction smaller than 2.36 mm = ((91-0.08)/99.92*100)= 90.99%

More than 50% of coarse fraction is smaller than 2.36mm

Therefore, soil is Sand S

% of fines (particles smaller than 0.075 mm) = 0.08%,

% Fines is less than or equal to 5%

Therefore, soil is Well Graded SAND (SW) or Poorly Graded SAND (SP)

Soil does not meet requirements for SW as Cu < 4 and and Cz is not 1 < Cz < 3.

Therefore Soil is Poorly Graded SAND (SP)

7.

The applications for poorly graded SAND (SP) run into trouble, as it is hard to

successfully compact. Often the surface layer is the main problem. Through the

use of table 3 it shows that the soil can be used as embankment or under-slab fill.

It can be used as a shell for a earth dam, preferred to be more gravelly. Also the

application of a construction material is considered an option for the soil.