Problem Statement:$-$

Design a concrete mix for M$40$ grade of concrete having slump in range of $\backslash (\backslash$mathbf$\{50-75$ m m$\}\backslash )$ with the following given material properties:$-$

$-$ Cement to be used: OPC $43$ grade.

$-$ Specific gravity of cement is $3\mathrm{.}15.$

$-$ Grading proportion of coarse aggregate $20$ mm and $10$ mm is $\backslash (60\backslash \%\backslash )$ and $\backslash (40\backslash \%\backslash )$ respectively.

$-$ Sand is zone II$.$

$-$ High range water reducing admixture of specific gravity $1\mathrm{.}05$ is to be used $(\backslash (0\mathrm{.}8\backslash \%\backslash )$ of weight of cement used$).$

$-$ Properties of aggregate:

Note: Calculate angularity no$.$ of coarse aggregate using above data by yourself. Assume any other suitable data if required.