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Specific Gravity Chapter 2.13 1 1/29/2015 Mechanical Analysis - - PDF document
Specific Gravity Chapter 2.13 1 1/29/2015 Mechanical Analysis - - PDF document
1/29/2015 Specific Gravity Chapter 2.13 1 1/29/2015 Mechanical Analysis Chapter 2.14 2 1/29/2015 Soil Particle Size Sieve Analysis Hydrometer Analysis USCS gravel sand fines (silt and clay sizes) AASHTO gravel sand silt clay
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Soil Particle Size
60 0.06 gravel sand silt clay MIT gravel sand silt clay USDA gravel sand silt clay AASHTO gravel sand fines (silt and clay sizes) USCS Grain size (mm) 2 0.002
Sieve Analysis Hydrometer Analysis
Sieve Analysis
percent coarser
- r
percent retained percent finer
- r
percent passing
Percentages are calculated by mass
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Soil Particle Size
60 0.06 gravel sand silt clay MIT gravel sand silt clay USDA gravel sand silt clay AASHTO gravel sand fines (silt and clay sizes) USCS #200 #4 Grain size (mm) #10 2 0.002 #40
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Hydrometer Analysis Hydrometer Analysis
d
F 3 Dv
3 g s w
1 F D g 6 dynamic viscosity v
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Hydrometer Analysis
L cm D mm K t min
s
30 K G 1
Dynamic Viscosity (kN·s/m2) Temperature (ºC)
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Hydrometer Analysis
50 g of soil 1000 ml of water Sodium hexametaphosphate
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Grams
- f soil
per liter
- f water
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Gradation Curve Effective Size Uniformity Coefficient Coefficient of Gradation
Chapter 2.15
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10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 100 PERCENT PASSING GRAIN SIZE IN MILLIMETERS
Effective Size
D10
10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 100 PERCENT PASSING GRAIN SIZE IN MILLIMETERS
Uniformity Coefficient
D10 D60
60 u 10
D C D
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10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 100 PERCENT PASSING GRAIN SIZE IN MILLIMETERS
Coefficient of Gradation
D10 D60
2 30 c 60 10
D C D D
D30
STANDARD GRADATION CURVES 10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 100 GRAIN SIZE IN MILLIMETERS PERCENT PASSING
Example
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Particle Shape
Chapter 2.16
Particle Shape
Bulky Flaky Needle-shaped
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Halloysite Montmorillonite
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