THE COOPER UNION
Albert Nerken School of Engineering
SOIL MECHANICS LABORATORY
Experiment No. 3 - Grain Size Distribution Analysis 
Name:

Date:

Group No.:
Members:

Location: Depth:
Boring: Elevation:
Sample: Description:

TABLE 1. - Moisture Content of Fine Fraction

Weight of Container and Wet Soil, gm. 
 Weight of Container & Dry Soil, gm. 
Weight of Container, gm.
Weight of Moisture, gm.
Weight of Dry Soil, gm.
Moisture Content, %.

TABLE 2. - Dry Weight of Coarse and Fine Fraction

Weight of Pan & Wet Fine Fraction, gm.
Weight of Pan, gm.
Weight of Wet Fine Fraction, gm.
Moisture Content of Fine Fraction, %
Weight of Dry Fine Fraction, gm.
Weight of Dish & Coarse Fraction, gm.
Weight of Dish, gm.
Weight of Dry Coarse Fraction, gm
Weight of Dry Coarse & Fine Fraction (w/correction), gm.
- No. 10 Correction (if any) 

 

TABLE 3. - Sieve Analysis of Coarse Fraction
Sieve Number Size Opening (mm) Individual Grams Retained Cumulative Grams Finer % Finer

 

 


TABLE 4. - Sieve Analysis of Fine Fraction

Sieve Number Size Opening (mm) Cumulative Grains Retained Cumulative Grains Finer % Finer
of No. 10 of Whole

 

  Formulae:  

1a) H'r = H + h/2

1b) Hr = H'r - V/2A

2) % Finer = (Vt / Ws) * (Gs / Gs-1) * (RH gc-gw) * 100

3) v = (gs - gf ) / (18 mf) * D2

h = Ht. of bulb, cm. gc = Unit wt. of water at caliberation temp of hydrometer, gm/cc
V = Vol. of bulb, cc. gw = Unit wt. of water at temp of soil suspension, gm/cc
A = Cross-sectional area of cylinder, cm2 v = Vel. of grain , cm/sec
%F = % finer than any equiv. grain size gs = Density of soil grains, gm/cc
Vt = Total vol. of soil suspension, cc. mf = Viscosity of fluid, gm-sec/cm2
Ws = Dry Wt. of hydrometer sample, gm. D = Equiv. grain size, cm.
Gs = Specific gravity of soil gf = Unit wt. of fluid at temp of soil suspension, gm/cc
Rh = Corr. hydrometer reading

 

 

 

 

 

TABLE 5. - Dry Weight of Hydrometer Sample

Weight of Dish and Wet Soil, gm.
Weight of Dish, gm.
Weight of Wet Soil, gm.
Moisture Content, %
Weight of Dry Soil, gm.

  TABLE 6. - Hydrometer Calibration

Type

Number

Volume, cc.

Specific Gravity

Height of Bulb, cm.

Area, cm2

cm

cd

D'ag't

  

H @
@
@
@
H'r @
@
@
@
Hr @
@
@
@

  TABLE 7. - Hydrometer Analysis

Date Time Elapsed Time (sec) Temp oC R'H R"H = R'H +cm D (mm) RH = R"H +/- cd % Finer
of No. 10 of Whole