Design the concrete mix according to the following conditions: het Design Environment Pavement slab, Bozeman, Montana (cold climate) Required design strength = 000 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.

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Chapter2: Loads On Structures
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The required design strength is 5000 psi

No variation for the statistical variation in concrete strength please 

7.9 Design the concrete mix according to the following conditions: quell
Design Environment
Pavement slab, Bozeman, Montana (cold climate)
Required design strength = 000 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. nominal maximum size, crushed stone m
Bulk oven-dry specific gravity = 2.573, absorption = 2.8%
Oven-dry rodded density = 120 pcf
Moisture content = 1%
Fine aggregate: Natural sand
onts stage gg6
Bulk oven-dry specific gravity = 2.540, absorption = 3.4%
Moisture content = 4.5%
Fineness modulus 2.68
www.m
Transcribed Image Text:7.9 Design the concrete mix according to the following conditions: quell Design Environment Pavement slab, Bozeman, Montana (cold climate) Required design strength = 000 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. nominal maximum size, crushed stone m Bulk oven-dry specific gravity = 2.573, absorption = 2.8% Oven-dry rodded density = 120 pcf Moisture content = 1% Fine aggregate: Natural sand onts stage gg6 Bulk oven-dry specific gravity = 2.540, absorption = 3.4% Moisture content = 4.5% Fineness modulus 2.68 www.m
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