rding to the following conditions. Design Environment Pavement slab, (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 Ib cement. Coarse aggregate: 2 in. nominal maximum size, crushed stone Bulk oven-dry specific gravity = 2.573 Absorption
rding to the following conditions. Design Environment Pavement slab, (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 Ib cement. Coarse aggregate: 2 in. nominal maximum size, crushed stone Bulk oven-dry specific gravity = 2.573 Absorption
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Design the concrete mix according to the
following conditions.
Design Environment
Pavement slab, (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 Ib cement.
Coarse aggregate: 2 in. nominal maximum
size, crushed stone
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
Required Compressive Strength
Water-Cement Ratio
Coarse Aggregate Requirement
Check Aggregate Size
Air Content (Use Maximum)
Slump (Use Maximum)
Water Content
Cement Requirement
Admixture
Fine Aggregate Requirement
Final Batch Quantities (Adjusted Summary)
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