Question #$1$ SO$-(4)$ Design a concrete mix for the following conditions and constraints using the absolute volume method, concrete is designed for Columns, The specified structural compressive strength is $30$ Mpa, The max. aggregate size of $19$ mm$,$ concrete is subjected to F and T $,$ and deicing chemicals $.$ Standard deviation of compressive strength of $2\mathrm{.}1$ Mpa is expected $.$ No of samples is $18.$ Minimum concrete cover $=40$mm Minimum space between reinforcement$=30$mm For coarse agg. The BSG $($D$)=2\mathrm{.}67$ unit wt$.=1700$Kg$/$m$3$ absorption capacity $2\%,$ moisture content $2\mathrm{.}5\%.$ For fine agg. The fineness modulus is $2\mathrm{.}6,$ BSG $($D$)=2\mathrm{.}5,$ free moist$=0,2\%.1-$ What is the most suitable type of cement. $2-$ Is concrete used Air$-$Entrained or Non$-$ Air Entrained? Why $?3-$ What is the mix. proportions for concrete ingredients after correction. $4-$ What are the quantities required for $3(150$ mm $)$ cubes and $5(150$x$300$mm $)$ cylinders.