Total of three compressive strength tests were conducted for three 28-day concrete specimen of each batch of concrete. The results were presented in the table below. Batch Test 1 Test 2 Test 3 Concrete 29.163 28.380 29.220 1 Concrete 31.773 31.416 29.619 Concrete 29.55 30.60 32.77 Compute the Modulus of Elasticity (GPa) of Concrete 2. Use the formula of modulus of elasticity provided in the NSCP 2015 for normal weight concrete.

Total of three compressive strength tests were conducted for three 28-day concrete specimen of each batch of concrete. The results were presented in the table below. Batch Test 1 Test 2 Test 3 Concrete 29.163 28.380 29.220 1 Concrete 31.773 31.416 29.619 Concrete 29.55 30.60 32.77 Compute the Modulus of Elasticity (GPa) of Concrete 2. Use the formula of modulus of elasticity provided in the NSCP 2015 for normal weight concrete.

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

QI- A concrete cylindrical specimen 155 mm in diameter and 290 mm long is subjected to compressive loading up to failure. The following data shown in table below are obtained. Draw the stress- strain curve and determine: i) the concrete strength. ii) Initial Tangent Modulus. iii) Modulus of Elasticity. Iv) Secant Modulus at 90% of strength and v) State which type of stress strain behavior is this. Load, kN Deformation, mm×10* (Load - 8x16) (Deformation x 0.5x16) 222.5 103 413.1 206 635.2 324 730.4 378 856.1 432 953.6 486 1080.7 540 1171.2 756 1270.0 1025 1396.3 1395
Q2- A cylindrical concrete specimens 150 mm in diam. and 300mm high each were tested in split tensile test, the following results were observed, determine the tensile strength of concrete and estimate the compressive strength. S.N 1 3 4 7 Load, kN 267.3 269.4 260.5 255.4 287.2 291.4 282.5 (Load+5x18
what would be the average compressive strength of concrete if the load at failure of the 3 trials are 55,100 kg 54,800 kg and 55,200 kg. Diameter of the sample is 6" a. 31.1 MPa b. 30.6 MPa c. 31.6 MPa d. 30.1 MPa
I want this please
Q5. The compressive strength of concrete specimen follows a normal distribution with a mean value of 2.8 ksi and Coefficient of Variation of 0.1. If the applied stress is 2.5 ksi, find the probability of failure.
Home The compressive strength of samples of cement can be modeled by a normal distribution with a mean, , of 6000 kg/cm² and a standard deviation, o, of 100 kg/cm². (a) What is the probability that a sample's strength is less than 6250 kg/cm²? Ans. 0.9938. (b) What is the probability that a sample's strength is between 5800 and 5900 kg/cm²? Ans. 0.1359 (c) What strength is exceeded by 95% of the samples? Ans. 5836.5
Obtain the following, for all problems below: a) The judgment as regards the extent of produced concrete being in accordance with the requirements of the project. b) The impact of the means of sample preparation and testing on the variation of the obtained results. c) The level of “Quality Control" for the produced concrete. d) Prediction of the extent of compliance of the produced concrete – in future – with the project requirements. In case the requirements are not satisfied, what are the steps that should be followed?
In order to estimate in-situ compressive strength, Rebound Hammer test is applied on a concrete shear wall. The following twelve Rebound numbers are measured. Estimate the compressive strength of the concrete in terms of cube strength. (Use the related charts provided at Rebound Numbers: 42 41 38 O a. 38 MPa O b. 36 MPa O c. 40 MPa O d. 456 kgf/cm² O e. 36 kgf/cm² 39 16 37 44 38 40 43 38 40
A concrete test cylinder with a cross-sectional area of 28.3 in squared is to be tested in axial compression. Before loading two marks are scribed on the cylinder precisely 8 in apart (as shown in the figure below) when the load is 40,000 lb the marks are measured and found to be 7.997 in apart determine the E value for this concrete. Assume an approximately linear relationship between stress and strain.
2. In a ready-mix concrete plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 5,000 psi. The following compressive strength data were collected. Sample No. 1 2 3 4 5 6 7 8 9 10 Compressive strength (psi) 5595 5139 6359 5192 5188 5241 5964 5875 6155 5115 Sample No. 11 12 13 14 15 16 17 18 19 20 Compressive strength (psi) 6695 5449 5278 6697 5195 6021 5320 5657 6595 5235 a. Calculate the mean, standard deviation, and the coefficient of variation of the data b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible reasons. Comment on the data scatter.
Situation 3 A compressive strength test were conducted to the following cylinder; Cylinder 1 3015 psi Cylinder 2 2950 psi Cylinder 3 3253 psi Cylinder 4 3004 psi Cylinder 5 3031 psi It is observed that the size of the cylinder is 6% in x 12" which is much bigger that the standard cylinder specimen. 1. What would be the reported compressive strength for each cylinder. 2. What is the average compressive strength? 3. If the target compressive strength at: 3 days is 3000 psi, What can you say about the test result?
Objective Questions : Answer the following question briefly. 1. How do you test flexural strength ? 2. How do you conduct the flexural strength of concrete ? Show a sketch. 3. What are the factors affecting flexural tests? 4. What is the importance of flexural strength in concrete? 5. What does the higher flexural modulus mean ? 6. How do you calculate the flexural strength of concrete?. 7. Why is flexure test two point loading.?