Based upon the table provided. determine as many of the concrete mix design characteristics  as possible for the following:
---- A structural concrete  column within a school building that is 450x450 mm in cross-sectional area.15mm diameter reniforcing steel bars have a minimum cover of 40mm and are spaced at 60 mm o.c. vertically and150 mm o.c. horizontally. The column is on the interior of level two but is on the exterior on level one (supporting a cantilever of level two).the engineer is calling for a maximum slump of 25mm.

 

Maximum water- Minimum design Exposure cement ratio by compressive strength, f, MPa Exposure condition category mass for concrete Select water-cement Select strength Concrete protected from exposure to freezing and thawing, application of deicing chemicals, or aggressive FO SO ratio on basis of based on structural strength, workability, requirements and finishing needs PO CO substances P1 Concrete intended to have low 0.50 28 permeability when exposed to water Concrete exposed to freezing and thawing in a moist condition or deicers F1 F2 0.45 31 F3 For corrosion protection for reinforced concrete exposed to chlorides from deicing salts, salt water, brackish water, seawater, or spray from these sources C2 0.40 35 Water, kilograms per m' of concrete, for aggregate size (mm) Slump, mm 9.5 12.5 19 25 37.5 50 75 150 25 to 50 181 175 168 160 150 142 122 107 75 to 100 202 193 184 175 165 157 133 119 150 to 175 216 205 197 184 174 166 154 Recommended average total air content, percent, for level of exposure Mild exposure 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 Moderate exposure (F1) 6.0 5.5 5.0 4.5 4.5 4.0 3.5 3.0 Severe exposure (F2 & F3) 7.5 7.0 6.0 6.0 5.5 5.0 4.5 4.0