This document provides information on sieve analysis testing of soils based on IS 2720 Part 4. It discusses the objectives of classification of soils, coefficient of curvature, uniformity coefficient, and fineness modulus. Sieve analysis is used to determine gradation of soils, mix design proportions, and filter design. The test involves sieving soil samples through a series of sieves and weighing the material retained on each sieve. Calculations are made to determine coefficients and fineness modulus.

1. SIEVE ANALYSIS
(IS 2720 PART4)
Sawanpreet Singh
Anoop Singh
Engineering Soil
Testing

2. Objectives
 Classification of Soil
 Coefficient of curvature
 Uniformity coefficient
 Fineness Modulus

3. Applications
 Gradation of soil:
Well graded
Poorly graded
 Proportioning of soil for mix design
 Design of filters

4. Theory
If more than 50% of sample is retained on IS Sieve
4.75mm,
sample is gravel
If more than 50% of sample passes through IS Sieve

5. Theory
 Coefficient of Curvature :
Cc = D30
2
D10 x D60
Between 1 -3 : Well graded gravel and sand

6. Theory
 Uniformity Coefficient :
Cu = D60
D10
More than 4 - Well graded gravel
More than 6 – Well graded sand
(IS 1498 - 1970)

7. Theory
 Fineness modulus (FM) :
sum of total percentage of
the
FM = sample retained on each
sieve
100
2 – 4 : fine soil

8. Apparatus
 Two set of sieves:
Set1:
IS sieves of size 300mm, 80mm, 40mm, 20mm, 10mm,
4.75mm
Set 2 :
IS sieves of size
2mm,0.85mm,0.425mm,0.15mm,0.075mm
 Mechanical Shaker
 Brush
 Oven

9. Procedure
 For sample retaining on 4.75mm sieve ,
Use set 1 – 5kg sample
 For sample passing through 4.75mm sieve,
Use set 2 – 1kg sample

10. Procedure
 Clean all the sieves and pan properly with
brush.
 Arrange the sieves according to size, with pan
at bottom and size increasing upwards.
 Put the sample in top sieve and Place it in the
shaker.
Ensure that the sieves are held tightly in the
shaker.

11. Procedure
 Operate the shaker for 5-10 minutes.
 Weight the material retained on each sieve to
nearest 1 gram.

13. Precautions
 While drying, the temperature of oven should
not be more than 105°C because higher
temperature may cause permanent change in
0.075mm material.
 During shaking, soil sample should not be
allowed to come out.
 For plotting, percent finer should be
determined with respect to total soil taken for

14. Observations and Calculations
IS
Sieve
2.36m
m

15. Observations and Calculations
IS
Sieve
1.18m
m

16. Observations and Calculations
IS Sieve
0.600m
m

17. Observations and Calculations
IS Sieve
0.300mm

18. Observations and Calculations
IS Sieve
0.150mm

19. Observations and Calculations
IS Sieve
0.075mm

20. Observations and Calculations
Pan

21. Observations and Calculations

22. Observations and Calculations

23. Result

25. Thank
You!!