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 USDA gravel sand silt clay MIT gravel sand silt clay 2 0.06 60 0.002 Grain size (mm) Sieve Analysis   percent coarser    or  percent retained    Percentages are calculated  by mass  percent finer    or  percent passing    3

1/29/2015 Soil Particle Size #4 #10 #40 #200 USCS gravel sand fines (silt and clay sizes) AASHTO gravel sand silt clay USDA gravel sand silt clay MIT gravel sand silt clay 2 0.06 60 0.002 Grain size (mm) 4

1/29/2015 Hydrometer Analysis Hydrometer Analysis   F 3 Dv d   dynamic viscosity v 1    6     3 F D g g s w 5

1/29/2015 Hydrometer Analysis   L cm    D mm K t min    30  K    G 1 s Dynamic Viscosity (kN·s/m 2 ) Temperature (ºC) 6

1/29/2015 Hydrometer Analysis 50 g of soil 1000 ml of water Sodium hexametaphosphate 7

1/29/2015 Grams of soil per liter of water 8

1/29/2015 Gradation Curve Effective Size Uniformity Coefficient Coefficient of Gradation Chapter 2.15 9

1/29/2015 Effective Size 100 90 80 70 PERCENT PASSING 60 50 40 30 20 10 0 D 10 100 10 1 0.1 0.01 GRAIN SIZE IN MILLIMETERS Uniformity Coefficient 100 90 80 D 70  60 C u D PERCENT PASSING 60 10 50 40 30 20 10 0 D 60 100 10 1 D 10 0.1 0.01 GRAIN SIZE IN MILLIMETERS 10

1/29/2015 Coefficient of Gradation 100 90 80 2 D 70  30 C c D D PERCENT PASSING 60 60 10 50 40 30 20 10 0 D 60 D 30 D 10 100 10 1 0.1 0.01 GRAIN SIZE IN MILLIMETERS STANDARD GRADATION CURVES Example 100 90 80 70 PERCENT PASSING 60 50 40 30 20 10 0 100 10 1 0.1 0.01 GRAIN SIZE IN MILLIMETERS 11

1/29/2015 Particle Shape Chapter 2.16 Particle Shape Bulky Flaky Needle-shaped 12

1/29/2015 Halloysite Montmorillonite 13

1/29/2015 Quartz Sand Bulky Particles 14