Objective:

To determine the fineness modulus and fine size distribution of fine aggregates (river sand and beach sand) by sieve analysis.

Apparatus used:

Mechanical shaker, Trays, Set of fine sieves with pan, Weighing scale etc.

 Description Fineness Modulus of Fine Aggregate is an imperial factor obtained by adding the cumulative percentages of fine aggregates retained on each of the standard sieves and dividing the sum by an arbitrary number 100.

STEP  1 

Choose the type of sand

River Sand








Beach Sand

STEP  2 

 Take fine aggregate in a pan and measure it to 1Kg using the weighing scale.

0.000 g

1000.00 g

STEP    3 

 Arrange the sieves in the decreasing order of their size and place the pan at the bottom and then add weighed quantity of fine aggregate to the top most sieve and close the lid.

STEP   4 

 Place the set of sieves in the mechanical shaker and allow to shake for 10 minutes.

STEP   5 

 Collect the soil fraction retained on each sieve in a separate container and weigh it.

0.000 g

Please HOVER on the SIEVE SET to shake it

Please HOVER out of the SIEVE SET to proceed

STEP    6 

Observations:

River Sand (Total weight of sample = 1000g)

Sieve size (mm)	Weight retained (g)	Percentge weight retained	Cumulative percentage weight retained	Cumulative percentage finer	Fineness modulus
4.75	18
2.36	50
1.18	54
0.6	90
0.3	396
0.15	342
0.075	45
Pan	5
	1000

Beach Sand (Total weight of sample = 1000g)

Sieve size (mm)	Weight retained (g)	Percentge weight retained	Cumulative percentage weight retained	Cumulative percentage finer	Fineness modulus
4.75	0
2.36	0
1.18	6
0.6	22
0.3	340
0.15	584
0.075	42
Pan	6
	1000

Percentge weight retained = ^{Weight retained x 100}⁄_{Weight of fine aggregate taken} Cumulative % weight retained of sieve_n= Cumulative % weight retained of sieve_n-1 + % weight retained of sieve_n Cumulative percentge error = 100 - Cumulative percentge weight retained Fineness modulus = ^{Sum of cumulative percentge weight retained}⁄₁₀₀

*Hover on the table headings to know the formula

Characteristic Curves

Result:

Effective size at 10% finer by weight, D₁₀=

Effective size at 30% finer by weight, D₃₀=

Effective size at 60% finer by weight, D₆₀=

Uniformity coefficient, C_u= ^D₆₀⁄_D10 =     

✔

Curvature coefficient, C_c= ^D₃₀2⁄_{D60 x D10} =     

✔