Question

1. Determine the percent finer than each sieve size and plot the grain size- distribution curve.

2. Determine the values of D60, D30, and D10 for the grain-size distribution curve.

3. Calculate the uniformity coefficient Cu and the coefficient of gradation Cg.

4. Comment on the degree of gradation (i.e., whether the soil is well graded, poorly graded, or gap graded, etc.)

Sieve #	Mass of Soil Retained on each Sieve (gram)
4	0
10	27
20	58
40	112
60	136
80	144
100	233
200	38
Pan	22

Answer 1

The soil is Gap Graded