1.) Classify the following soils using the Unified Soil Classification System (USCS) and plot

each of their respective grain size distribution curves on a single semi-log scatter plot.

Tables 1 and 2 have all necessary data for classification.

Table 1. Sieve Analysis Data for All Soils

Diam (mm)

4.75

2

1

0.5

0.15

0.075

0.05

0.003

0.002

Liquid Limit

Soil A

Plastic Limit

100

100

100

100

93

84

75

12

8

% Finer than by Mass

Soil B Soil C

26

100

98

ΝΑ

95

ΝΑ

86

24

2

NA

Soil A Soil B

NA

90

75

62

48

28

Table 2. Atterberg Limits for Soils in Table 1

16

9

10

NA

NA

Soil C

46

34

Soil D

60

34

28

24

18

15

10

NA

ΝΑ

Soil D

37

18