Design a PCC mix for the following scenario:

CE 20400 Spring 2020

Design Environment: Unreinforced Slab in Minneapolis,Minnesota

                                  Consider the city to be a cold climate with severe weather

Required design strength: 4500 psi

Slabthickness:                  18 inches

Statistical data indicate a standard deviation of compressivestrength of 200 psi

      (more than 30 samples)

Only air entrainer allowed

Air entrainer: Manufacturer specification is: 0.20 fl oz/1%air/100 lb cement

Courseaggregate:            1 ½” nominal maximum size crushed stone

                                           Bulk oven dry specific gravity 2.5

                                           Absorption 0.2%

                                           Oven-dry rodded density 125 pcf

                                           Moisture content 1.5%

Fineaggregate:                 Natural sand

                                           Bulk oven dry specific gravity 2.45

                                           Absorption 0.2%

                                           Moisturecontent 4%

                                           Fineness modulus 2.8

Cement                              Specific gravity 3.15