ump = 6 inches ize of CA = 25 mm odulus of CA = 2.60 - of CA = 1600 Kg/m3 - = 1.00
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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 = 2.477.8 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 %3DDesign 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
- 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 d) The amount…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…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 = 2.50
- 7.8 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 Moisture content = 2% Fineness modulus = 2.47 = 2.659, absorption = 0.5%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…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 = 3.15Find the required quantities of cement, water, coarse aggregate, fine aggregate, aircontent, and admixture per 1 m3 of concrete. Summarize the findings in a table.Based on this information, find the…
- A concrete mix includes the following ingredients per cubic meter: Cement%3D400 kg Water=184 kg No admixture Table below shows possible alternatives mix ingredients. Indicate in the appropriate boxes in the table what will happen in each case for the workability and the ultimate compressive strength as increase, decrease or approximately the same. What will happen? Cement Water Admixture (kg) (kg) Ultimate compressive Workability strength 400 225 None 449 184 None Water 400 184 Reducer Water 400 128 Reducer 400 184 Super Plasticizer 400 184 Air Entrainer 400 184 Accelerator DFocusDesign 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 = 2.68Design 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 = 2.68