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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 = 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
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EBK MATERIALS FOR CIVIL AND CONSTRUCTIO
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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 = 2.47arrow_forward7.8 Design the concrete mix according to the following conditions: Design Environment Building frame Required design strength Minimum dimension 27.6 MPa || 150 mm Minimum space between rebar Minimum cover over rebar Statistical data indicate a standard deviation of compressive strength of 2.1 MPa is expected (more than 30 samples). Only air entrainer is allowed. 40 mm = 40 mm 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 Oven-dry rodded density Moisture content = 2.5% 2.55, Absorption = 0.3% = 1761 kg/m³ Fine aggregate: Natural sand Bulk oven-dry specific gravity 2.659, Absorption 0.5% Moisture content = 2% Fineness modulus 2.47 %3Darrow_forwardDesign the concrete mix according to the following conditions:Design Environment• Building beamo Required design strength = 27.6 MPao Minimum dimension = 150 mmo Minimum space between rebar = 40 mmo Minimum cover over rebar = 40 mmo Statistical data indicate a standard deviation of compressive strengthof 2.1 MPa is expected (more than 30 samples).• Only air entrainer is allowed.• Moderate Sulphate exposure.• Available Materialso Air entrainer:▪ Manufacture specification 6.3 mL/1% air/100 kg cement.o 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 = 2.5o Fine aggregate:▪ Natural sand▪ Bulk oven-dry specific gravity = 2.659▪ Absorption = 0.5▪ Moisture content = 2▪ Fineness modulus = 2.47o Cement▪ Type II (Moderate Sulphate Resistant)▪ Specific Gravity = 3.15Based on this information, find the following and summarize the findings in a table d) The amount…arrow_forward
- Design the concrete mix according to the following conditions:Design Environment• Building beamo Required design strength = 27.6 MPao Minimum dimension = 150 mmo Minimum space between rebar = 40 mmo Minimum cover over rebar = 40 mmo Statistical data indicate a standard deviation of compressive strengthof 2.1 MPa is expected (more than 30 samples).• Only air entrainer is allowed.• Moderate Sulphate exposure.• Available Materialso Air entrainer:▪ Manufacture specification 6.3 mL/1% air/100 kg cement.o 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 = 2.5o Fine aggregate:▪ Natural sand▪ Bulk oven-dry specific gravity = 2.659▪ Absorption = 0.5▪ Moisture content = 2▪ Fineness modulus = 2.47o Cement▪ Type II (Moderate Sulphate Resistant)▪ Specific Gravity = 3.15Based on this information, find the following and summarize the findings in a table.a) Required…arrow_forwardDesign the concrete mix according to the following conditions: Design environment Tennis court, subjected to freezing Required design strength =21 MPa Slab thickness=300 mm Statistical data indicate a standard deviation of compressive strength of 3.7 MPa is expected (for 50 samples) Only air entrainer is allowed Available materials: Air=7% Air entertainer: Manufacturer specification is 9.0 ML /1% air/100kg cement Slump=50 mm Coarse aggregate: 50 mm nominal maximum size, crushed stone Bulk volume oven-dry specific gravity=2.61, absorption=2.8%, oven-dry rodded density=1870 kg/m3 Moisture content=1% Fine aggregate: Natural sand Bulk oven-dry specific gravity=2.54, absorption=3.4% Moisture content= 4.5% Fineness modulus=2.60 Cement: Type I, relative density=3.1arrow_forwardDesign the concrete mix according to the following conditions:Design EnvironmentPavement slab, Bozeman, Montana (cold climate)Required design strength = 3000 psiSlab thickness = 12 in.Statistical data indicate a standard deviation of compressive strength of250 psi is expected (more than 30 samples).Only air entrainer is allowed.Available MaterialsAir entrainer: Manufacture specification is 0.15 fl oz/1% air/100 lb cement.Coarse aggregate: 2 in. nominal maximum size, crushed stoneBulk oven-dry specific gravity = 2.573, absorption = 2.8,Oven-dry rodded density = 120 pcfMoisture content = 1,Fine aggregate: Natural sandBulk oven-dry specific gravity = 2.540, absorption = 3.4,Moisture content = 4.5,Fineness modulus = 2.68arrow_forward
- 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 = 2.47arrow_forwardDesign the concrete mix according to the following conditions:Design EnvironmentPavement slab, subjected to freezingRequired design strength = 21 MPaSlab thickness = 300 mmStatistical data indicate a standard deviation of compressive strength of1.7 MPa is expected (more than 30 samples).Only air entrainer is allowed.Available MaterialsAir entrainer: Manufacture specification is 9.5 mL/1% air/100 kgcement.Coarse aggregate: 2 in. nominal maximum size, crushed stoneBulk oven-dry specific gravity = 2.573, absorption = 2.8,Oven-dry rodded density = 1922 kg/m3Moisture content = 1,Fine aggregate: Natural sandBulk oven-dry specific gravity = 2.540, absorption = 3.4,Moisture content = 4.5,Fineness modulus = 2.68arrow_forwardDesign a concrete mix for the following conditions and constraints using the abso- lute volume method: Design Environment Bridge pier exposed to freezing and subjected to deicing chemicals Required design strength = 24.1 MPa Minimum dimension = 0.3 m Minimum space between rebars = 64 mm Minimum cover over rebars = 64 mm Standard deviation of compressive strength of 2.4 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 6.3 mL/1% air/100 kg cement Coarse aggregate 25 mm nominal maximum size, river gravel (round) Bulk oven dry specific gravity = 2.621, absorption = 2.4% Oven dry-rodded density = 1681 kg/m³ Moisture content = 1.5% Fine aggregate Natural sand Bulk oven-dry specific gravity = 2.572, absorption = 0.8% %3D Moisture content = 4% Fineness modulus = 2.60arrow_forward
- 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 = 2.50arrow_forwardDesign 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…arrow_forwardDesign a concrete mix for the following conditions and constraints using the absolute volume method:Design EnvironmentBuilding frameRequired design strength = 27.6 MPaMinimum dimension = 150 mmMinimum space between rebars = 40 mmMinimum cover over rebars = 40 mmStatistical data indicate a standard deviation of compressive strength of 2.1 MPa is expected (more than 30 samples)Only air entrainer is allowedAvailable MaterialsAir EntrainerManufacturer specification 6.3 ml/1% air / 100 kg cementCoarse aggregate19 mm nominal maximum size, river gravel (rounded)Bulk oven dry specific gravity = 2.55, Absorption = 0.3%Oven dry-rodded density = 1761 kg/m3Moisture content = 2.5%Fine aggregateNatural sandBulk oven-dry specific gravity = 2.659, Absorption = 0.5%Moisture content = 2%Fineness modulus = 2.47arrow_forward
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