Concrete is required for a foundation located below ground where no substantial freezing and thawing occur. The 28-day compressive strength should be 4,000 lb./in?. The slump should be 2 in. and the maximum aggregate size should not exceed ¾ in. The properties of the materials are as follows: Cement : Type I, specific gravity = 3.15 Coarse Aggregate: Bulk specific gravity (SSD) = 2.82; absorption capacity = 3%; dry-rodded unit weight 125 lb./ft.3; surface moisture = 0%; Moisture content = %3D %3D 3% Fine Aggregate: Bulk specific gravity (SSD) = 2.60; absorption capacity = 1.3%; fineness modulus = 2.70; surface moisture 2%; Moisture content = 3.3% %3D %3D

Concrete is required for a foundation located below ground where no substantial freezing and thawing occur. The 28-day compressive strength should be 4,000 lb./in?. The slump should be 2 in. and the maximum aggregate size should not exceed ¾ in. The properties of the materials are as follows: Cement : Type I, specific gravity = 3.15 Coarse Aggregate: Bulk specific gravity (SSD) = 2.82; absorption capacity = 3%; dry-rodded unit weight 125 lb./ft.3; surface moisture = 0%; Moisture content = %3D %3D 3% Fine Aggregate: Bulk specific gravity (SSD) = 2.60; absorption capacity = 1.3%; fineness modulus = 2.70; surface moisture 2%; Moisture content = 3.3% %3D %3D

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

Description
Concrete is required for a foundation located below
ground where no substantial freezing and thawing
occur. The 28-day compressive strength should be
4,000 lb./in?. The slump should be 2 in. and the
maximum aggregate size should not exceed 4 in.
The properties of the materials are as follows:
Cement : Type I, specific gravity = 3.15
Coarse Aggregate: Bulk specific gravity (SSD) = 2.82;
absorption capacity = 3%; dry-rodded unit weight =
125 lb./ft.3; surface moisture = 0%; Moisture content =
%3D
3%
Fine Aggregate: Bulk specific gravity (SSD) = 2.60;
absorption capacity = 1.3%; fineness modulus = 2.70;
surface moisture 2%; Moisture content = 3.3%
%3D
Box your final estimate.

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Concrete is required for a foundation located below ground where no substantial freezing and thawing occur. The 28-day compressive strength should be 4,000 lb./in2. The slump should be 2in. and the maximum aggregate size should not exceed 4 in. The properties of the materials are as follows: Cement : Type I, specific gravity = 3.15 Coarse Aggregate: Bulk specific gravity (SSD) = 2.82; absorption capacity = 3%; dry-rodded unit weight = 125 Ib./ft.3; surface moisture = 1%, Moisture content = 4% Fine Aggregate: Bulk specific gravity (SSD) = 2.60; absorption capacity = 1.3%; fineness modulus = 2.70; surface %3D %3D moisture = 2% Moisture content = 3.3% Compute for the estimated batch weights per cubic yard and the total in Ib/ft3
Concrete is required for a foundation located below ground where no substantial freezing and thawing occur. The 28-day compressive strength should be 4,000 lb./in2. The slump should be 2in. and the maximum aggregate size should not exceed ¾ in.The properties of the materials are as follows: Cement : Type I, specific gravity = 3.15 Coarse Aggregate: Bulk specific gravity (SSD) = 2.82;absorption capacity = 3%; dry-rodded unit weight = 125 lb./ft.3;surface moisture = 1%, Moisture content = 4% Fine Aggregate: Bulk specific gravity (SSD) = 2.60; absorptioncapacity = 1.3%; fineness modulus = 2.70; surface moisture = 2%Moisture content = 3.3% 3. The total estimated batch weight in Ib/ft^3? 4. What is the estimated batch weight of cement in 1b/yd^3? 5. What is the estimated batch weight of wet coarse aggregates in Ib/yd^3?
What is the maximum size of coarse aggregates in mm needed for the design mix? Round down your answer to the nearest whole number
Please include the table you are using with the answer.
Show complete solution
5. Design the concrete mix according to the following conditions: Design Environment Building frame Required design strength = 27.6 MPa Minimum dimension = 150 mm Minimum space between rebar = 40 mm Minimum cover over rebar = 40 mm Maximum slump is required Statistical data indicate a standard deviation of compressive strength of 2.1 MPa is expected (more than 30 samples). Only air entrainer is allowed. Available Materials Air entrainer: Manufacture specification 6.3 ml/1% air/100 kg cement. (Use maximum or +2% air content) Coarse aggregate: 19 mm nominal maximum size, river gravel (rounded) Bulk oven-dry specific gravity = 2.55, Absorption = 0.3% Oven-dry rodded density = 1761 kg/m3 Moisture content = 2% Fine aggregate: Natural Sand Bulk oven-dry specific gravity = 2.659, Absorption = 0.5% Moisture content = 2% Fineness modulus = 2.47
Consider the following example: The 28-day compressive strength should be 4,000 psi. The slump should be between 3 and 4 in. and the maximum aggregate size should not exceed 1 in. The coarse and fine aggregates in the storage bins are wet. The properties of the materials are as follows: • Cement : Type I, specific gravity = 3.15 • Coarse Aggregate: Bulk specific gravity (SSD) = 2.70; absorption capacity = 1.1%; dry-rodded unit weight : 105 lb./ft.3 surface moisture = 1% • Fine Aggregate: Bulk specific gravity (SSD) = 2.67; absorption capacity = 1.3%; fineness modulus = 2.70: surface moisture = 1.5% 5. What is the estimated batch weight of wet coarse aggregates in Ib/yd^3?
Consider the following example: The 28-day compressive strength should be 4,000 psi. The slump should be between 3 and 4 in. and the maximum aggregate size should not exceed 1 in. The coarse and fine aggregates in the storage bins are wet. The properties of the materials are as follows: • Cement: Type I, specific gravity = 3.15 • Coarse Aggregate: Bulk specific gravity (SSD) = 2.87; absorption capacity= 1.6%; dry-rodded unit weight = 121 lb./ft.3 surface moisture = 0.75% • Fine Aggregate: Bulk specific gravity (SSD) = 2.67; absorption capacity= 1.3%; fineness modulus = 2.70; surface moisture 1.12%
Consider the following example: The 28-day compressive strength should be 4,000 psi. The slump should be between 3 and 4 in. and the maximum aggregate size should not exceed 1 in. The coarse and fine aggregates in the storage bins are wet. The properties of the materials are as follows: • Cement : Type l, specific gravity = 3.15 • Coarse Aggregate: Bulk specific gravity (SSD) = 2.70; absorption capacity = 1.1%: dry-rodded unit weight = 105 lb./ft.3 surface moisture = 1% • Fine Aggregate: Bulk specific gravity (SSD) = 2.67; absorption capacity = 1.3%; fineness modulus = 2.70; surface moisture = 1.5%
Create a design mix using the ACI DESIGN MIX PROCEDURE with the following parameters: Non-air Entrained Concrete Required Strength = 35 MPa Required Slump = 6 inches Maximum Size of CA = 3/4 inches Fineness Modulus of CA = 2.45 Density of CA = 1555 Kg/m3 SG of Water = 1.00 SG of Cement = 3.15 SG of CA = 2.84 SG of FA = 2.40
subject: construction management and testing
A concrete mix with a 3-inch slump, w/c ratio of 0.50, and sand with a fineness modulus of 2.4 contains 1700 lb/ cu. yd of coarse aggregate. Compute the required weight of coarse aggregate per cubic yard. To adjust the mix so as to increase the compressive strength, the water-to-cement ratio is reduced to 0.45. Will the quantity of coarse aggregate increase, the decrease, or stay the same? Explain your answer.