Admixture for Concrete
Please carry out a concrete mix design for an air-entrained concrete production based on the following data below;
Characteristic strength: 69 N/mm2 28-day design strength concrete
Defective rate (k): 5%
PC strength class: 42,5
Aggregate type:
Coarse: Crushed
Fine : Uncrushed
Slump : S3 workability class under EN 206 (find out the range)
Maximum aggregate size : 28 mm (2-digit)
Maximum free w/c ratio: 0.48
Minimum cement content: 385 kg/m3
Relative density of aggregate : 2.69 (2 decimal places)
Grading of fine aggregate passing 600 µm : 70%
Standard deviation: 4 N/mm2
Air content: 4%
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Design a concrete mix in accordance with the B.R.E. method and calculate the quantity of each...
Design a concrete mix in accordance with the B.R.E. method and
calculate the quantity of each constituent material for trial mix.
The specification of the concrete mix is:
1. Design a concrete mix in accordance with the B.R.E. method and calculate the quantity of each constituent material for trial mix. The specification of the concrete mix is: • Characteristic strength at 28 days: 40 N/mm² • Standard deviation : 8 N/mm • Proportion defective : 5% • Cement type :...
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Problem with different moisture conditions: 5. Calculate the quantities of cement, water, fine ag...
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Question 1. A concrete mix is to be designed for use in a 250 mm thick road pavement. The desired properties are pr...
Question 1. A concrete mix is to be designed for use in a 250 mm thick road pavement. The desired properties are provided below. Use the ACI method to calculate the required amounts per unit volume (/1m) of water, cement, course aggregate and fine aggregate. Slump 25 mm Average 28-day flexural strength of at least 4.5 MPa Coarse aggregate: nominal maximum size = 37.5 mm, dry-rodded weight 1600 kg/m3, specific gravity 2.68, moisture content 1.0 percent, absorption 0.5 percent Fine...
Compute the SSD mix proportions for the following mix design using the ACI method: Compressive Strength:...
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paste t 1.5 refer, artificial sand or natural river sand, to obtain a fresh concrete Which...
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Design the concrete mix according to the following conditions: Design Environment Pavement slab, Bozeman, Montana (cold...
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Please show which equations you use and describe in detail. 21. concrete mix design, Design the...
Please show which equations
you use and describe in detail.
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The question is as follows:-
Q) Design the concrete mixture for the slab
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NEC2103-Engineering Materials and Construction Example Mix Design Problems Question 2. Design a concrete mix using...
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Design a concrete mix in accordance with the B.R.E. method and
calculate the quantity of each constituent material for trial mix.
The specification of the concrete mix is:
1. Design a concrete mix in accordance with the B.R.E. method and calculate the quantity of each constituent material for trial mix. The specification of the concrete mix is: • Characteristic strength at 28 days: 40 N/mm² • Standard deviation : 8 N/mm • Proportion defective : 5% • Cement type :...
The following requirements are specified for concrete construction of a reinforced concrete jetty exposed to sea water and moderate freeze and thaw environment Required Design Strength, fc Slump required Standard deviation Cement 35 MPa 25-75 mnm 4.8 MPa Ordinary portland cement with relative density 3.15 Fine Aggregate (Natural Sand) Oven-dry relative densitv SSD moisture content Moisture content of sample Fineness Modulus 2.3 0.2 % 4.3 % 2.63 Coarse aggregate (crushed stone) Nominal maximum aggregate size Oven-dry relative density SSD moisture...
Problem with different moisture conditions: 5. Calculate the quantities of cement, water, fine aggregate, and coarse aggregate per trial mix of 1 m3 for the following specifications. Target mean compressive strength-30 MPa at 7 days; Cement strength class 42.5; Slump required 100 mm; Max. Aggregate size 20 mm; specific gravity of aggregates 2.65% Coarse aggregate UNCRUSHED (10, 20mm), fine aggregate CRUSHED (50% pass 600 micros); Maximum allowable free- water/cement ratio 0.40; Minimum allowable cement content 275 kg/m3; Absorption of fine...
Question 1. A concrete mix is to be designed for use in a 250 mm thick road pavement. The desired properties are provided below. Use the ACI method to calculate the required amounts per unit volume (/1m) of water, cement, course aggregate and fine aggregate. Slump 25 mm Average 28-day flexural strength of at least 4.5 MPa Coarse aggregate: nominal maximum size = 37.5 mm, dry-rodded weight 1600 kg/m3, specific gravity 2.68, moisture content 1.0 percent, absorption 0.5 percent Fine...
Compute the SSD mix proportions for the following mix design using the ACI method: Compressive Strength: 3,000 psi Slump: 4 inches Non-Air Entrained Concrete The materials have the following properties: | Cement: Type I, specific gravity = 3.15 | Fine Aggregate: Bulk specific gravity = 2.68; fineness modulus = 2.40 Coarse Aggregate: Maximum size aggregate = 1 inch; bulk specific gravity = 2.68; Dry-rodded unit weight = 100 lbs/ft3
paste t 1.5 refer, artificial sand or natural river sand, to obtain a fresh concrete Which kind of sand we p workability under the same other situations? d is used, the cement content can be . If the natural while proportioning the - nerete with the same strength grade. two typical pozzolanic materials generally used in concrete, and unsoundness of cement was mainly caused by too much f and free in the clinker. Incorporation too much gypsum in the cement...
Design the concrete mix according to the following conditions: Design Environment Pavement slab, Bozeman, Montana (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...
Please show which equations
you use and describe in detail.
21. concrete mix design, Design the concrete mix according to the following conditions: Design Environment Unreinforced slab, Bozeman, Montana (cold climate) Required design strength = 3500 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%/100 lb cement Coarse aggregate: 2...
The question is as follows:-
Q) Design the concrete mixture for the slab
2. A reinforced slab concrete foundation is to be poured for a building. The building is to be constructed near Edmonton. The slab will be in direct contact with the soil, and the soil typically has a sulphate content of 0.3 percent by mass. The minimum rebar spacing in the slab is 100 mm. The contractor is certain that his workers can place a concrete with a...
NEC2103-Engineering Materials and Construction Example Mix Design Problems Question 2. Design a concrete mix using fly ash from the following data for use as fly ash concrete blocks. Use the British DOE method to calculate the required amounts (in kg/m') of water, cement, course aggregate and fine aggregate. Characteristic 28 days mean strength 25 MPa Risk factor may be taken =1.65 Standard deviation = 5.0 The max. size of coarse, aggregate C.A. = 20 mm 40% F.A. passes through 600...
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