CE $308$

SOIL MECHANICS

Problem Set $2$

The following are the results of a sieve and hydrometer analysis:

$\backslash$table$[[$U$.$S$.$ Sieve No$.,$Weight of soil retained $($g$)],[4,28],[10,42],[20,48],[40,128],[60,221],[100,86],[200,40],[$Pan$,24]]$

a$.$ Determine the percent of finer than each sieve and plot a grain size distribution curve.

b$.$ Determine $D_{10},D_{30},$ and $D_{60}$ from the grain size distribution curve.

c$.$ Calculate the uniformity coefficient, $C_u$

d$.$ Calculate the coefficient of gradation, $C_c.$

$2.$ Repeat Problem $1$ with the following:

$\backslash$table$[[$U$.$S$.$ Sieve No$.,$Percent finer than,$],[,20,100],[,80,96],[,170,85],[$Hydrometer$,200,80],[,0\mathrm{.}04mm,59],[,0\mathrm{.}02mm,39],[,0\mathrm{.}01mm,26],[,0\mathrm{.}005mm,15],[,0\mathrm{.}0015mm,8]]$