(ASAP PLEASE) Design a concrete mix for the following conditions and constraints using the Absolute Volume Method. The material description are as follows: I. Design Environment i. Retaining Wall exposed to moderate sulfate exposure ii. Required Design Compressive Strength = 27.6 MPa iii. Standard Deviation of Compressive Strength of 1.8 MPa is expected (25 sample only) iv. Minimum dimension = 200 mm v. Minimum space between re-bars = 50 mm vi. Minimum cover over re-bars = 50 mm vii. Maximum Slump is required viii. Only air entrained is allowed II. Available Materials i. Air Entrained – Manufacture Specification 5.5ml/1% air/100 kg cement (use maximum or +2% air content) ii. Coarse Aggregates 25 mm Nominal Maximum Aggregate Size Rounded River Gravel (Note: apply water content reduction) Bulk Oven-dry specific gravity = 2.65 Absorption = 0.2% Moisture Content = 1.4% Oven-dry Rodded Density = 1565 kg/m3 iii. Fine Aggregates Natural Sand Bulk Oven-dry specific gravity = 2.70 Absorption = 0.7% Moisture Content = 1.6% Fineness Modulus = 2.60 Determine the following: f. The workability requirement. g. The water content requirement. h. The cementing materials content requirement. i. The admixture requirement. j. The fine aggregate requirement. k. The moisture corrections.
(ASAP PLEASE) Design a concrete mix for the following conditions and constraints using the Absolute Volume Method. The material description are as follows: I. Design Environment i. Retaining Wall exposed to moderate sulfate exposure ii. Required Design Compressive Strength = 27.6 MPa iii. Standard Deviation of Compressive Strength of 1.8 MPa is expected (25 sample only) iv. Minimum dimension = 200 mm v. Minimum space between re-bars = 50 mm vi. Minimum cover over re-bars = 50 mm vii. Maximum Slump is required viii. Only air entrained is allowed II. Available Materials i. Air Entrained – Manufacture Specification 5.5ml/1% air/100 kg cement (use maximum or +2% air content) ii. Coarse Aggregates 25 mm Nominal Maximum Aggregate Size Rounded River Gravel (Note: apply water content reduction) Bulk Oven-dry specific gravity = 2.65 Absorption = 0.2% Moisture Content = 1.4% Oven-dry Rodded Density = 1565 kg/m3 iii. Fine Aggregates Natural Sand Bulk Oven-dry specific gravity = 2.70 Absorption = 0.7% Moisture Content = 1.6% Fineness Modulus = 2.60 Determine the following: f. The workability requirement. g. The water content requirement. h. The cementing materials content requirement. i. The admixture requirement. j. The fine aggregate requirement. k. The moisture corrections.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
(ASAP PLEASE) Design a concrete mix for the following conditions and constraints using the Absolute Volume Method. The material description are as follows:
I. Design Environment
i. Retaining Wall exposed to moderate sulfate exposure
ii. Required Design Compressive Strength = 27.6 MPa
iii. Standard Deviation of Compressive Strength of 1.8 MPa is expected (25 sample only)
iv. Minimum dimension = 200 mm
v. Minimum space between re-bars = 50 mm
vi. Minimum cover over re-bars = 50 mm
vii. Maximum Slump is required
viii. Only air entrained is allowed
II. Available Materials
i. Air Entrained – Manufacture Specification 5.5ml/1% air/100 kg cement (use maximum or +2% air content)
ii. Coarse Aggregates
25 mm Nominal Maximum Aggregate Size
Rounded River Gravel (Note: apply water content reduction)
Bulk Oven-dry specific gravity = 2.65
Absorption = 0.2%
Moisture Content = 1.4%
Oven-dry Rodded Density = 1565 kg/m3
iii. Fine Aggregates
Natural Sand
Bulk Oven-dry specific gravity = 2.70
Absorption = 0.7%
Moisture Content = 1.6%
Fineness Modulus = 2.60
Determine the following:
f. The workability requirement.
g. The water content requirement.
h. The cementing materials content requirement.
i. The admixture requirement.
j. The fine aggregate requirement.
k. The moisture corrections.
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