Sieve Data:
Sieve
Number
Sieve
Opening
Size (mm)
Mass of
Sieve (g)
Mass
Retained
(Sieve +
Soil)(g)
Mass Retained
(Sieve + Soil)(g)
Group 1 ,2 Groups 3, 4, 5
4 4.760 499.60 509.60 514.6
8 2.360 475.90 491.00 485.9
10 2.000 481.50 495.00 494
16 1.180 435.40 515.80 509.9
20 0.850 405.80 454.80 460.8
40 0.425 386.40 502.50 486.8
50 0.300 370.60 436.31 405.2
60 0.250 372.40 396.70 390.8
100 0.150 349.30 399.18 414.3
200 0.075 304.20 324.15 338.4
PAN 183.46 238.33 263.86
TOTAL
Lab #3- Hydrometer Analysis Data Sheet
Description of soil: _ Look at table below
Temperature.: _______20 degree Celsius___model 152H__
Location: ____Soils lab_____________
Date: ______09/22/2020____________________
Time
(t, min.)
Hydrometer Reading
(R)
Group #1 Group #2,4 Group #3, 5
Brown
Sandy clay
Clayey Silt Silt
0.25 51 51 No reading
0.5 50 50 48
1 49 49 47
2 48 47 42
4 47 45 37
8 46 44 33
15 45 43 30
30 44 41 26
60 43 39 23
120 41 37 No reading
240 39 34 No reading
480 37 31 18
1440 35 27 No reading
2880 No reading 24 No reading
GRAIN SIZE ANALYSIS OF SOILS
DEFINITION
Grain size analysis is the determination of the size grain
of particles present in a soil. It is expressed as a
percentage of the total dry weight. Two tests are
generally used to find particle size distribution of soil:
(1) Sieve analysis. (2) Hydrometer analysis.
INTRODUCTION
ย The sieve analysis is generally applied to the soil fractio
n larger
than 75 ยตm (retaining on the No. 200 Sieve). Grains smaller than
75 ยตm (0.075 mm) are sorted by using sedimentation process
(hydrometer analysis).
The basic principles for sieve analysis and
hydrometer analysis are described in the following two
sections.
SECTION ONE
SIEVE ANALYSIS
DEFINITION
Sieve analysis consists of shaking the soil sample through a set of
sieves that have progressively smaller openings.
INTRODUCTION
ย Fortunately, not all soils contain the full range of particle sizes so the test
can be simplified. Soils that are non-cohesive may only require dry sieving.
It is usually considered that the sedimentation procedure is not necessary
if the soil contains less than 10% fines.
ย Soils may be divided on the basis of their dominating particle size six
arbitrary categories which are called boulders, cobbles, gravel, sand, silt
and
clay.
Sieve Designation
0.002 0.06 2 60mm
colloids fine medium coarse
CLAY SILT SAND GEAVEL COBBLES
Particle Size 1 5 75 425ยตm 2.00 4.75 75 mm
No.200 No.40 No.10 No.4
(a) U.S.A. ASTM: American Society for Testing and Material D422
Particle Size 2 6 20 60 200 600ยตm 2 6 20 60 200 mm
(b)BS 1377:1975 British Standard
PARTICLE SIZE DISTRIBUTION CURVE
ย The particle size distribution curve, also known as a gradation
curve, represents the distribution of particles of different sizes in
the soil mass.
A coarse soil is described as: