Question #$3(4$ pts$.)$:

A sieve analysis was performed on a sample of the top layer of the soil, with the results shown below:

Sieve Size $($in$.)$

Amount

retained $(g)$

$\backslash$table$[[\frac{1}{2},\frac{3}{8},4,8,16,30,40,50,100,200,$pan$],[0,0,34\mathrm{.}2,97\mathrm{.}2,222\mathrm{.}8,461\mathrm{.}7,534\mathrm{.}6,573\mathrm{.}6,465\mathrm{.}6,452\mathrm{.}4,398\mathrm{.}4]]$

Do the following:

a$)$ Calculate the percent retained and percent passing each sieve, and graph the results on a semi$-$log graph $($you may use the attached chart, or graph in Excel and include with your submission$).$ Then, characterize the gradation of the material. $(2$ pt$.)$

b$)$ Calculate the values of $D_{10},D_{30},D_{60},C_u,$ and $C_c(1$ pt$.).$

c$)$ If the LL is $55$ and the PL is $46,$ determine the USCS classification of the soil, and state its suitability for the purpose stated in the scenario. $(1$ pt$.)$