You are a trainee at the building site which had 3000 NFP bricks delivered. Youthen determined the compressive strength of each bricks as per SANS227 testingregulations. Bricks were ordered with a nominal compressive strength of 3,5 MPaand minimum individual value of 3,0 Mpa. The results from the lab are as follows:Compressive strengthSample 23,43,7Sample 13,4Sample 33,43,7Brick no13,733,53,53,53,23,73,23,343,253,74,13,64,073,93,43,983,13,13,13,33,33,32,93,13,63,4103,9114,13,8123,73,7From the above set of results, state whether these bricks would be accepted orrejected for based on their strength. Support your answers.

Average compressive strength of brick in each samples test:

Answered: You are a trainee at the building site…

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

Three standard mortar cubes were made using non-potable water available at the job site, and three others were made using potable water. The cubes were tested for compressive strength after seven days of curing and produced the following failure loads in kilograms: Based on these results only, would you accept that water for mixing concrete according to ASTM standards? Why? Nonpotable Water Potable Water 6909 7773 6591 7400 7227 7364
2. In order to evaluate the suitability of non-potable water available at the job site for mixing concrete, six standard mortar cubes were made using that the water and six others using potable water. The cubes were tested for compressive strength after 7 days of curing and produced the following loads of failure (in pounds), Cubes Made with Cubes Made with Potable Water Nonpotable Water 16,200 17,800 16,530 16,820 17,920 15,690 18,820 16,720 14,530 15,820 14,160 16,100 15,870 14,380 a. Based on these results only, would you accept that water for mixing concrete according to ASTM C94? b. According to ASTM C94, are there other tests to be performed to evaluate the suitability of that water? Discuss briefly.
Three 6 in. * 12 in. concrete cylinders with water to cement ratios of 0.4, 0.6,and 0.8, respectively. After curing for 28 days, the specimens were subjected to increments of compressive loads until failure. The load versus deformation results were as shown in Table .Assuming that the gauge length is the whole specimen height, it is required todo the following:a. The compressive stresses and strains for each specimen at each loadincrement.b. Plot stresses versus strains for all specimens on one graph.c. The ultimate strength for each specimen.d. The modulus of elasticity as the secant modulus at 40% of the ultimatestress for each specimen.e. The strain at failure for each specimen.f. The toughness for each specimen.g. Comment on the effect of increasing the water–cement ratio on thefollowing:i. Ultimate strengthii. Modulus of elasticityiii. Ductilityiv. Toughness. Curves may be approximated with a series of straight lines.
Concrete Compressive Strength test Discussion: 1.Why did you use three samples?2. What changes do you need to apply if you were to use three standard cube samples instead?(reference needed)3. According to the relevant Australian Standards, what is the acceptable tolerance for yourtarget strength and target workability? (reference the standard clause you have used to answer the question). In what range should the values of your compressive test and slumpresults be to be deemed acceptable?
In order to evaluate the sustainability of non-potable water available in the job site for mixing concrete, six standard mortar cubes were made using that water and six others using potable water. The cubes were tested for compressive strength after 7 days of curing and produced the loads to failure (in kN) shown in table below. Based on these results, would you accept that water for mixing concrete? Cubes made with Cubes made with non-potable water potable water 64.6 73.5 70.4 74.8 63.0 79.7 71.6 69.8 70.6 83.7 64.0 74.4
2. What is the standard size of PCC specimens to be tested for compressive strength? If a smaller size is used, which size is expected to provide higher compressive strengths? Why? Which size provides strengths close to that of an actual concrete structure? 3. What is the purpose of performing the flexure test on concrete? How are the results of this test related to the compressive strength test results? 4. What are the advantages of using a third-point loading flexure test over a center-point loading flexure test? Draw a shear force diagram and a bending moment diagram for each case to support your answer.
! Three 150 mm x 300 mm concrete cylinders with randomly oriented steel fiber contents of 0, 2, and 3% by weight, respectively. After curing for 28 days, the specimens were subjected to increments of compressive loads until fail- ure. The load versus deformation results were as shown in Table P11.14. TABLE P11.14 Specimen No. Fiber Content (%) 1 2 3 2 Deformation (mm) Load (kN) 0.31 565 565 565 0.61 716 (failure) 756 792 0.91 641 756 1.22 440 690 1.52 378 641 1.83 351 (failure) 605 (failure) Assuming that the gauge length is the whole specimen height, determine the following: a. The compressive stresses and strains for each specimen at each load increment. b. Plot stresses versus strains for all specimens on one graph. c. The modulus of elasticity for each specimen. d. The ultimate strength for each specimen. e. The strain at failure for each specimen. f. Toughness. Curves may be approximated with a series of straight lines. g. Comment on the effects of increasing the fiber content on…
Two 150 mm x 300 mm concrete cylinders with randomly oriented steel fiber contents of 0 and 2% by weight, respectively. After curing for 28 days, the specimens were subjected to increments of compressive loads until fail- ure. The load versus deformation results were as shown in Table P7.45. TABLE P7.45 Specimen no. 2 Fiber content (%) 2 Deformation (mm) Load (kN) 0.0305 507 507 0.0610 645 (failure) 681 0.0915 578 0.0915 396 1.525 338 (failure) Assuming that the gauge length is the whole specimen height, determine the following: a. The compressive stresses and strains for each specimen at each load increment. b. Plot stresses versus strains for the two specimens on one graph. c. The initial modulus of elasticity for each specimen. d. The ultimate strength for each specimen. e. The strain at failure for each specimen. f. Toughness. Curves may be approximated with a series of straight lines. g. Comment on the effect of adding fiber on the following: i. Modulus of elasticity ii. Ultimate…
Three 150 mm * 300 mm concrete cylinders with water to cement ratios of0.4, 0.6, and 0.8, respectively. After curing for 28 days, the specimens weresubjected to increments of compressive loads until failure. The load versusdeformation results were as shown in Table P7.26. Assuming that the gauge length is the whole specimen height, it is required todo the following:a. The compressive stresses and strains for each specimen at each loadincrement.b. Plot stresses versus strains for all specimens on one graph.c. The ultimate strength for each specimen.d. The modulus of elasticity as the secant modulus at 40% of the ultimatestress for each specimen.e. The strain at failure for each specimen.f. The toughness for each specimen.g. Comment on the effect of increasing the water–cement ratio on thefollowing:i. Ultimate strengthii. Modulus of elasticityiii. Ductilityiv. Toughness. Curves may be approximated with a series of straight lines.
Three 2" x 2" x 2" mortar cubes were made using potable water and another three of the same dimensions of mortar cubes using non- potable water found at the job site. All mortar cubes were subjected to compressive strength test after 7 days of curing. The tate below shows the result of the test. Failure Load in Failure Load in kN using Non- kN using Potable Water Potable Water 56.50 63.27 57.20 65.10 59.26 60.16 Based on these results, is it acceptable to use the non-potable water found at the jobsite for mixing concrete according to ASTM standard? Discuss your answer briefly.
Three concrete specimens were prepared and tested under compressive load for 7-days, the following data was collected. Specimens Dimensions (cm cm * cm) 15 * 15 * 15 Age (days) Compressive load (kN) I.D. 1 7 360 15 * 15 * 15 7 405 15 * 15 * 15 7 315 Determine the average of compressive strength for the maximum loading before failure loading.
The frequency distribution of the compressive strength of 20 concrete cube specimens is given in the table, f(MPa) Number of specimens with compressive strength equal to f 23 4 28 2 22.5 31 29 4 If uis the mean strength of the specimens and o is the standard deviation the number of specimens (out of 20) with compressive strength less than u-3o is

SEE MORE QUESTIONS

Recommended textbooks for you

Structural Analysis

Civil Engineering

ISBN:

9781337630931

Author:

KASSIMALI, Aslam.

Publisher:

Cengage,

Structural Analysis (10th Edition)

Civil Engineering

ISBN:

9780134610672

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Principles of Foundation Engineering (MindTap Cou…

Civil Engineering

ISBN:

9781337705028

Author:

Braja M. Das, Nagaratnam Sivakugan

Publisher:

Cengage Learning

Structural Analysis

Civil Engineering

ISBN:

9781337630931

Author:

KASSIMALI, Aslam.

Publisher:

Cengage,

Structural Analysis (10th Edition)

Civil Engineering

ISBN:

9780134610672

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Principles of Foundation Engineering (MindTap Cou…

Civil Engineering

ISBN:

9781337705028

Author:

Braja M. Das, Nagaratnam Sivakugan

Publisher:

Cengage Learning

Fundamentals of Structural Analysis

Civil Engineering

ISBN:

9780073398006

Author:

Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning

Publisher:

McGraw-Hill Education

Sustainable Energy

Civil Engineering

ISBN:

9781337551663

Author:

DUNLAP, Richard A.

Publisher:

Cengage,

Traffic and Highway Engineering

Civil Engineering

ISBN:

9781305156241

Author:

Garber, Nicholas J.

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS