03 - mechanical analysis - memphis
TRANSCRIPT
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1
Specific Gravity
Chapter 2.13
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2
Mechanical Analysis
Chapter 2.14
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3
Soil Particle Size
60 0.06
gravel sand silt clayMIT
gravel sand silt clayUSDA
gravel sand silt clayAASHTO
gravel sand fines (silt and clay sizes)USCS
Grain size (mm)
2 0.002
Sieve Analysis Hydrometer Analysis
Sieve Analysis
percent coarseror
percent retained
percent fineror
percent pas sing
Percentagesare calculatedby mass
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4
Soil Particle Size
60 0.06
gravel sand silt clayMIT
gravel sand silt clayUSDA
gravel sand silt clayAASHTO
gravel sand fines (silt and clay sizes)USCS
#200#4
Grain size (mm)
#10
2 0.002
#40
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5
Hydrometer Analysis
Hydrometer Analysis
dF 3 Dv
3g s w
1F D g
6
dynamic viscosity v
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6
Hydrometer Analysis
L cmD mm K
t min
s
30K
G 1
Dyn
amic
Vis
cosi
ty (
kN·s
/m2)
Temperature (ºC)
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7
Hydrometer Analysis
50 g of soil
1000 ml of water
Sodiumhexametaphosphate
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8
Grams of soil
per liter of water
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9
Gradation Curve
Effective SizeUniformity Coefficient
Coefficient of Gradation
Chapter 2.15
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10
0
10
20
30
40
50
60
70
80
90
100
0.010.1110100
PE
RC
EN
T P
AS
SIN
G
GRAIN SIZE IN MILLIMETERS
Effective Size
D10
0
10
20
30
40
50
60
70
80
90
100
0.010.1110100
PE
RC
EN
T P
AS
SIN
G
GRAIN SIZE IN MILLIMETERS
Uniformity Coefficient
D10D60
60u
10
DCD
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11
0
10
20
30
40
50
60
70
80
90
100
0.010.1110100
PE
RC
EN
T P
AS
SIN
G
GRAIN SIZE IN MILLIMETERS
Coefficient of Gradation
D10D60
230
c60 10
DCD D
D30
STANDARD GRADATION CURVES
0
10
20
30
40
50
60
70
80
90
100
0.010.1110100
GRAIN SIZE IN MILLIMETERS
PER
CE
NT
PA
SSIN
G
Example
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12
Particle Shape
Chapter 2.16
Particle Shape
Bulky
Flaky
Needle-shaped
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13
Halloysite
Montmorillonite
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14
Quartz Sand
Bulky Particles