Using the ACI and DoE mix design methods, design a concrete mix for an application requiring a characteristic strength of 40MPa at 28 days and a slump of 10-30 mm.  

The materials available are: 

OPC- Uncrushed fine and coarse aggregate 

S.G. of aggregate=2.68 

Max. Nominal size of c.aggregate =10mm 

F.agg. confirms to grading Zone III. 

Concrete is likely to be exposed to moderate climate. 

Standard dev. 6.3, defective rate=5%,prob.factor k=1.65 

(Appropriate assumption for any missing data and applied charts is required