Design a concrete mix for the following conditions and constraints using the absolute volume method Design Environment Bridge pier exposed to freezing and subjected to deicing chemicals Required design = 25.1 MPa Minimum dimension = 0.4 m Minimum space between rebars = 60 mm Minimum cover over rebars = 50 mm Standard deviation of compressive strength of 2.8 MPa is expected (more than 30 samples) Only air entrainer is allowed Available Materials Cement Select Type V due to exposure Air Entrainer Manufacturer specification 6.2 ml/1% air/100 kg cement Coarse aggregate 25 mm maximum size, river gravel (round) Bulk oven dry specific gravity = 2.621, Absorption = 0.4% Oven dry-rodded density = 1650 kg/m3 Moisture content = 1.4% Fine aggregate Natural sand Bulk oven-dry specific gravity = 2.576, Absorption = 0.7% Moisture content = 3% Fineness modulus = 2.50
Design a concrete mix for the following conditions and constraints using the absolute volume method Design Environment Bridge pier exposed to freezing and subjected to deicing chemicals Required design = 25.1 MPa Minimum dimension = 0.4 m Minimum space between rebars = 60 mm Minimum cover over rebars = 50 mm Standard deviation of compressive strength of 2.8 MPa is expected (more than 30 samples) Only air entrainer is allowed Available Materials Cement Select Type V due to exposure Air Entrainer Manufacturer specification 6.2 ml/1% air/100 kg cement Coarse aggregate 25 mm maximum size, river gravel (round) Bulk oven dry specific gravity = 2.621, Absorption = 0.4% Oven dry-rodded density = 1650 kg/m3 Moisture content = 1.4% Fine aggregate Natural sand Bulk oven-dry specific gravity = 2.576, Absorption = 0.7% Moisture content = 3% Fineness modulus = 2.50
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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10. Design a concrete mix for the following conditions and constraints using the absolute volume method
Design Environment
Bridge pier exposed to freezing and subjected to deicing chemicals Required design = 25.1 MPa
Minimum dimension = 0.4 m
Minimum space between rebars = 60 mm
Minimum cover over rebars = 50 mm
Standard deviation of compressive strength of 2.8 MPa is expected (more than 30 samples)
Only air entrainer is allowed
Available Materials Cement
Select Type V due to exposure Air Entrainer
Manufacturer specification 6.2 ml/1% air/100 kg cement Coarse aggregate
25 mm maximum size, river gravel (round)
Bulk oven dry specific gravity = 2.621, Absorption = 0.4% Oven dry-rodded density = 1650 kg/m3
Moisture content = 1.4%
Fine aggregate
Natural sand
Bulk oven-dry specific gravity = 2.576, Absorption = 0.7% Moisture content = 3%
Fineness modulus = 2.50
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