Problem $6$ Plot the grain size distribution curves using Excel. For each classification, you must

show all steps required to justify the classification selected.

c$.$ For Soil $1$: The in$-$situ water content was determined to be $23\mathrm{.}5\%.$ What is the

liquidity index for this soil? What does this LI tell you about the relative strength of

the soil in the current state $($in$-$situ water content$)?$ What is the Activity of this soil?

Do you expect that this soil has the tendency to swell based on the Activity?

The laboratory results for two soils are given below. Copy all plots into your main pdf

file.

Soil $1$ Casagrande Cup Device Liquid Limit Test Data

Oven$-$dried LL is approximately equal to the non$-$oven$-$dried LL

Plastic Limit $=20$

a$.$ For Soil $1$: Plot the grain size distribution curve. $($Copy and paste your plot into your

main pdf file.$)$ Plot the liquid state line based on the provided LL test data and

determine the LL$.$ You must show on your plot how you determined the LL$.$ Classify

the soil according to USCS $($symbols and words$)$ and the AASHTO classification

system $($Group Classification and GI$).$ What is this soil's general rating as a

subgrade?

b$.$ For Soil $2$: Plot the grain size distribution curve. Classify the soil according to ASTM.

State the classification in symbols and words.