Question $1$

$[15$ Marks$]$

Two compaction tests are reported below.

Soil A

$\backslash$table$[[$Test No$.,1,2,3,4,5],[$Mass of wet soil $($kg$),4\mathrm{.}26,4\mathrm{.}32,4\mathrm{.}41,4\mathrm{.}41,4\mathrm{.}37],[$Mass of dry soil $($kg$),3\mathrm{.}43,3\mathrm{.}46,3\mathrm{.}50,3\mathrm{.}47,3\mathrm{.}41]]$

Volume of mould $=2305c{m}^3$

Soil specific gravity $=2\mathrm{.}65$

Soil B

$\backslash$table$[[$Test No$.,1,2,3,4,5],[$Mass of wet soil $($kg$),4\mathrm{.}77,4\mathrm{.}94,5\mathrm{.}12,4\mathrm{.}98,4\mathrm{.}82],[$Mass of dry soil $(kg),4\mathrm{.}38,4\mathrm{.}49,4\mathrm{.}61,4\mathrm{.}45,4\mathrm{.}26],[$V$,,,,,]]$

Volume of mould $=2305c{m}^3$

Soil specific gravity $=2\mathrm{.}65$

By plotting the data, determine which soil is a well graded gravel and which is a fat clay. Provide a reason for the selection.

$[15]$