The strength of a fully matured concrete sample is 500 kg/cm². When cured at an averagetemperature of 20°C in day, 10°C in night, datum temperature To is -11°C. If Plowmanconstants A is 32 and B is 54, the strength of identical concrete at 7 days will be nearly(a) 333 kg/cm²(c) 272 kg/cm²(b) 312 kg/cm²(d) 243 kg/cm²

Answered: Image /qna-images/answer/a034c211-e52b-42b3-9ec1-fdc88bc5d16f.jpg

The strength of a fully matured concrete sample is 500 kg/cm². When cured at an averag temperature of 20°C in day, 10°C in night, datum temperature To is -11°C. If Plowma constants A is 32 and B is 54, the strength of identical concrete at 7 days will be nearl (a) 333 kg/cm² (b) 312 kg/cm²

The strength of a fully matured concrete sample is 500 kg/cm². When cured at an averag temperature of 20°C in day, 10°C in night, datum temperature To is -11°C. If Plowma constants A is 32 and B is 54, the strength of identical concrete at 7 days will be nearl (a) 333 kg/cm² (b) 312 kg/cm²

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

a. When is it necessary to consolidate concrete by vibration in test method C231? Discuss the process of vibration when placing and consolidating the sample.b. When rodding a layer of concrete in method C138, is it okay to hit the bottom of the measure? If not, how is it supposed to be done?c. Calculate the yield of concrete if the mass of the batch is 4800 kg and its density is found to be 350 kg/m3.
If the target slump of concrete is 30 mm, the maximum nominal size of the coarse aggregate is 25 mm, and the smallest nominal size is 9.5 mm, how much water is needed in the ordinary concrete mix? If the target slump of concrete is 85 mm, the maximum nominal size of the coarse aggregate is 37.5 mm, and the smallest nominal size is 9.5 mm, how much water is needed in the ordinary concrete mix? If the compressive strength of concrete at 28 days is 38 MPa and the concrete is non-air entrained, what is the water-cement ratio of the concrete mix? If the required compressive strength of air entrained concrete is 26 MPa, what is the water-cement ratio of the concrete mix? The required Class D concrete is 5 cubic ft. What is the volume of sand in the 5 cubic ft. concrete mix. Mixing water is one half of the amount of cement powder.
The strength of a sample of matured concrete is found to be 34.5MPa. Find the strength of identical concrete at the age of 14days when cured at an average temperature during day time 25oC, and night at 12oC.
Q1 What moisture condition should the coarse and fine aggregate be in when mixing the concrete? A Unknown B Saturated C Oven Dry D Air Dried E SSD Q2 What restriction is placed on the size of a sample of a concrete batch? A 30 L B 15 L C 20 L D 10 L E 5 L
A batch of concrete is composed of 200 lbm fine aggregate, 350 lbm coarse aggregate, 94 lbm cement, and 5 gallons of water. The specific gravity of the fine and coarse aggregate is 2.65, and that of the cement as 3.10. What is the specific weight of concrete in lb/ft³?
The volume of concrete required for a certain project is 20m^3. The density of concrete is 2400kg/m^3. Concrete is composed of fine and coarse aggregates, water, and cementitious materials: cement and fly ash. The ratio of fine and coarse aggregates is 2:1. Water-to-cement ratio is 0.40. Percentage of the fly ash to the total cementitious material is 0.30. Total aggregate-to-cement ratio is 5:1. Density of fine aggregates is 2680kg/m^3. Density of coarse aggregate is 2500kg/m^3. Density of water is 1000kg/m^3. Density of cement is 3150kg/m^3. Density of fly ash is 1300kg/m^3. Determine the weight required for each component. All ratios use weights. Round off your answers to the nearest tenth of a kilogram. Have one significant figure after the decimal point. Find: Weight of Fine Aggregates: Weight of Coarse Aggregates: Weight of Water: Weight of Cement: Weight of Fly Ash:
The design of a concrete mix requires 1173 kg/m3 of gravel in dry condition, 582 kg/m3 of sand in dry condition, and 157 kg/m3 of free water. The gravel available at the job site has a moisture content of 0.8% and absorption of 1.5% and the available sand has a moisture content of 1.1% and absorption of 1.3%. What are the masses of gravel, sand and water cubic meter that should be used at the job site?
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
A1-What is the bond strength between steel and concrete and how it can be calculated? 2-What is the segregation of fresh concrete? Give its reason and how to control it? V3- What are the advantages of concrete? 3- Discuss the effect of age and curing on the compressive strength of concrete. 5-What are the main purposes of using plasticizer admixtures? 6-What are the main techniques that should be used to reduce heat of hydration in mass
As follows: 1- The reason for the decrease in concrete resistance when the temperature rises? 2- Reasons for preferring ready-mixed concrete over other types of concrete? 3- Why is it not preferred to mix concrete for a period of time more than required? 4- Why is adhesion between cement and aggregate paste more important in highly resistant concrete 5- Why is it important to get rid of the isolation phenomenon in soft concrete?
A) as follows 1- The reason for the decrease in concrete resistance when the temperature rises? 2- Reasons for preferring ready-mixed concrete over other types of concrete? 3- Why is it not preferred to mix concrete for a period of time more than required? 4- Why is bonding between cement and aggregate paste more important in highly resistant concrete? 5- Why is it important to get rid of the isolation phenomenon in soft concrete? B) between by drawing the following situations? 1. The relationship between checking the compaction factor and checking precipitation 2- The relationship between compressive strength and life of concrete containing fly ash in days
Urgent Take the unit weight of concrete to be 2400 kg/m3 and the specified compressive strength to be 28 MPa.From this, estimate the modulus of elasticity of concrete in GPa. (answer with complete solution) Final answer must be Ec = 26.752 GPa