Problem 2: Sieve Analysis and Soil Gradation
Using the plot below
A. Determine the percent gravet, sand and lines (silt clay), remembering that:
a. Mgravel Passing 3 in (75 mm) and retained on 04 (4.75 mm)
b. % sand Passing #4 (4.75 mm) and retained on #200 (0.075 mm)
6% silt and clay - Passing #200 (0.075 mm)
B. Determine Dio. Do Do Mark these values on the graph.
C. Determine the uniformity coefficient and coefficient of gradation (G. and C.),
D. Using the Cu and C, determine whether the soil is well, poorly or gap graded
34in No.4
9.8an No.10
No. 100
No. 40 No. 200
Steve Number
% passing
D50
100
10
0.1
001
0.001
Grain Diameter (mm)