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Design the concrete mix according to the following conditions Design Environment Pavement slab, Bozeman Montana cold climate Required design strength 3000 psi Slab thickness12 in

Design the concrete mix according to the following conditions.

Design Environment

Pavement slab, Bozeman, Montana (cold climate)

Required design strength=3000 psi

Slab thickness=12 in.

Statistical data indicate a standard deviation of compressive

strength of 250 psi is expected (more than 30 samples).

Only air entrainer is allowed.

Available Materials

Air entrainer: Manufacture specification is 0.15 fl oz/1% air/100

lb cement.

Coarse aggregate: 2 in. maximum size, crushed gravel (angular)

Bulk oven-dry specific gravity=2.573, Absorption=0.1%

Oven-dry rodded density=120 pcf

Moisture content=1%

Fine aggregate: Natural sand

Bulk oven-dry specific gravity=2.54, Absorption=0.2%

Moisture content=3.67%

Fineness modulus=2.68

May 20 2020 View more View Less

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