Question (2): 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. (i) Concrete compressive tests were conducted on concrete cubes of different locations within a construction project. The compressive strength values turned out as follows: Compressive Strength (N/mm2) Test Number Specimen 1 Specimen 2 Specimen 3 27.5 32.5 30 2 34 35 33 3 29 32 35 4 39 38 37 5 35.5 35 34.5 30.5 32.5 34.5 7 34 32.5 36.5 8. 32 30 34 31 32 33 10 30 28 29 11 31.5 32 33.5 12 30.5 31.5 32 Taking into consideration that the required characteristic strength of concrete is 30 N/mm; accepted percentage of defects is 5%.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Question (2):
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.
(i) Concrete compressive tests were conducted on concrete cubes of different locations within
a construction project. The compressive strength values turned out as follows:
Compressive Strength (N/mm2)
Test Number
Specimen 1
Specimen 2
Specimen 3
1
27.5
32.5
30
2
34
35
33
3
29
32
35
4
39
38
37
5
35.5
35
34.5
6.
30.5
32.5
34.5
7
34
32.5
36.5
8
32
30
34
31
32
33
10
30
28
29
11
31.5
32
33.5
12
30.5
31.5
32
2
Taking into consideration that the required characteristic strength of concrete is 30 N/mm ;
accepted percentage of defects is 5%.
Transcribed Image Text:Question (2): 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. (i) Concrete compressive tests were conducted on concrete cubes of different locations within a construction project. The compressive strength values turned out as follows: Compressive Strength (N/mm2) Test Number Specimen 1 Specimen 2 Specimen 3 1 27.5 32.5 30 2 34 35 33 3 29 32 35 4 39 38 37 5 35.5 35 34.5 6. 30.5 32.5 34.5 7 34 32.5 36.5 8 32 30 34 31 32 33 10 30 28 29 11 31.5 32 33.5 12 30.5 31.5 32 2 Taking into consideration that the required characteristic strength of concrete is 30 N/mm ; accepted percentage of defects is 5%.
(ii) Concrete compressive tests were conducted on concrete cubes of a construction project.
The compressive strength values were as follows:
Compressive Strength (N/mm²)
Specimen 2
Test Number
Specimen 1
Specimen 3
1
34.5
37.5
36
2
38
39
41
3
28.5
27
29
4
35
33
36
26.5
27
28.5
35.5
38.5
37
7
36
38
37
8.
26
29
28
34
37
35.5
10
31
27
30
Taking into consideration that the required characteristic strength of concrete is 25 N/mm2;
accepted percentage of defects is 5%.
(iii)Concrete compressive tests were conducted on concrete cubes of different locations within
a construction project. The compressive strength values turned out as follows:
Compressive Strength (N/mm²)
Test Number
Specimen 1
Specimen 2
Specimen 3
1
32.5
35
37.5
2
40
36
44
3
26.5
31.5
30
4
35
38.5
31.5
44
42
36
6.
30.5
25.5
28
7
29
32
26
8
34.5
29.5
32
40.5
37
33.5
10
25
30
27
Taking into consideration that the required characteristic strength of concrete is 27.5 N/mm ;
accepted percentage of defects is 10%.
Transcribed Image Text:(ii) Concrete compressive tests were conducted on concrete cubes of a construction project. The compressive strength values were as follows: Compressive Strength (N/mm²) Specimen 2 Test Number Specimen 1 Specimen 3 1 34.5 37.5 36 2 38 39 41 3 28.5 27 29 4 35 33 36 26.5 27 28.5 35.5 38.5 37 7 36 38 37 8. 26 29 28 34 37 35.5 10 31 27 30 Taking into consideration that the required characteristic strength of concrete is 25 N/mm2; accepted percentage of defects is 5%. (iii)Concrete compressive tests were conducted on concrete cubes of different locations within a construction project. The compressive strength values turned out as follows: Compressive Strength (N/mm²) Test Number Specimen 1 Specimen 2 Specimen 3 1 32.5 35 37.5 2 40 36 44 3 26.5 31.5 30 4 35 38.5 31.5 44 42 36 6. 30.5 25.5 28 7 29 32 26 8 34.5 29.5 32 40.5 37 33.5 10 25 30 27 Taking into consideration that the required characteristic strength of concrete is 27.5 N/mm ; accepted percentage of defects is 10%.
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