Q3: B: Design the concrete mix according to the following conditions:Design EnvironmentBuilding frameRequired design strength = 27.6 MPaMinimum dimension = 150 mmMinimum space between rebar = 40 mmMinimum cover over rebar = 40 mmStatistical data indicate a standard deviation of compressive strength of 2.1 MPa isexpected (more than 30 samples).Only air entrainer is allowed.Available MaterialsAir entrainer: Manufacture specification 6.3 ml/1% air/100 kg cement.Coarse aggregate: 19 mm nominal maximum size, river gravel (rounded)Bulk oven-dry specific gravity = 2.55, absorption = 3.6,Oven-dry rodded density = 1761 kg/m3%3DMoisture content = 2.5,Fine aggregate: Natural sandBulk oven-dry specific gravity 2.659, absorption=0.5,Moisture content = 2,Fineness modulus = 2.47

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Q3: B: 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 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

Q3: B: 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 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

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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Q3: B: 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
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.
Coarse aggregate: 19 mm nominal maximum size, river gravel (rounded)
Bulk oven-dry specific gravity = 2.55, absorption = 3.6,
Oven-dry rodded density = 1761 kg/m3
%3D
Moisture content = 2.5,
Fine aggregate: Natural sand
Bulk oven-dry specific gravity 2.659, absorption=0.5,
Moisture content = 2,
Fineness modulus = 2.47

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STEP 1: DETERMINATION OF DESIGN COMPRESSIVE STRENGTH :

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STEP 2: DETERMINATION OF WATER CEMENT RATIO:

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STEP 3: DETERMINATION OF MAXIMUM ALLOWABLE COARSE AGGREGATE SIZE AND ITS OVEN DRY WEIGHT:

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STEP 4: DETERMINATION OF AIR CONTENT AND WORKABILITY REQUIREMENT:

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STEP 5: DETERMINATION OF WATER CONTENT :

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STEP 6: DETERMINATION OF WATER CEMENT RATIO:

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STEP 7: DETERMINATION OF QUANTITY OF ADMIXTURE AND CONCRETE INGREDIENTS :

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STEP 8:

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