Q2. Design the concrete mix according to the following conditions: Design Environment: Building frame Required design strength = 21.9 MPa Fewer than 15 tests are available Minimum dimension = 150 mm Minimum space between rebar = 40 mm Minimum cover over rebar = 40 mm Only air entrainer is allowed. 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 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:

Q2. Design the concrete mix according to the following conditions: Design Environment: Building frame Required design strength = 21.9 MPa Fewer than 15 tests are available Minimum dimension = 150 mm Minimum space between rebar = 40 mm Minimum cover over rebar = 40 mm Only air entrainer is allowed. 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 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:

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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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 of2.1 MPa is expected (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/m3Moisture 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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Design the concrete mix according to the following conditions:Design Environment• Concrete slabo Subjected to freeze and thaw.o Required design strength = 21 MPao Slab thickness = 300 mm.o Statistical data indicate a standard deviation of compressive strengthof 1.7 MPa is expected (more than 30 samples).• Only air entrainer is allowed.• Available Materials:o Air entrainer:▪ Manufacture specification is 9.5 mL/1% air/100 kg cement.o Coarse aggregate:▪ 25 mm nominal maximum size▪ Crushed stone▪ Bulk oven-dry specific gravity = 2.573▪ Absorption = 2.8▪ Oven-dry rodded density = 1922 kg/m3▪ Moisture content = 1o Fine aggregate:▪ Natural sand▪ Bulk oven-dry specific gravity = 2.540▪ Absorption = 3.4▪ Moisture content = 4.5▪ Fineness modulus = 2.60o Cement:▪ Type I Cement▪ Specific gravity = 3.15…
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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 = 0.3% Oven-dry rodded density = 1761 kg/m3 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 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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Design the concrete mix according to the following conditions. Design Environment Pavement slab, Baguio City (severe 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 lb 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 Find the following requirements: 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…