Answer $2\mathrm{.}58$ not $2\mathrm{.}56.$ Plot the grain size distribution curve and classify the soils according to both USCS and AASHTO.

$2\mathrm{.}58$ The soils in Problem $2\mathrm{.}56$ have the following Atterberg limits and natural water contents. Determine the PI

and LI for each soil and comment on their general activity.

$2\mathrm{.}56$ On five$-$cycle semilogarithmic paper, plot the grain$-$size distribution curves from the following mechanical

analysis data on six soils; A through F$.$ For each soil determine the effective size as well as the uniformity

coefficient and the coefficient of curvature. Determine also the percentages of gravel, sand silt, and clay

according to $($a$)$ ASTM, $($b$)$ AASHTO, $($c$)$ USCS, and $($d$)$ the British Standard.

Note: Missing data is indicated by a dash in the column.

Chapter $2$ Index and Classification Properties of Soils

$2\mathrm{.}58$ The soils in Problem $2\mathrm{.}56$ have the following Atterberg limits and natural water contents. Determine the PI

and LI for each soil and comment on their general activity.