|
Strength classes for concrete |
Analytical relation /Explanation |
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|
fck(MPa) |
12 |
16 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
70 |
80 |
90 |
|
|
fck,cube (MPa) |
15 |
20 |
25 |
30 |
37 |
45 |
50 |
55 |
60 |
67 |
75 |
85 |
95 |
105 |
|
|
fcm(MPa) |
20 |
24 |
28 |
33 |
38 |
43 |
48 |
53 |
58 |
63 |
68 |
78 |
88 |
98 |
|
|
fctm(MPa) |
1.6 |
1.9 |
2.2 |
2.6 |
2.9 |
3.2 |
3.5 |
3.8 |
4.1 |
4.2 |
4.4 |
4.6 |
4.8 |
5.0 |
|
|
fctk 0.05 (MPa) |
1.1 |
1.3 |
1.5 |
1.8 |
2.0 |
2.2 |
2.5 |
2.7 |
2.9 |
3.0 |
3.1 |
3.2 |
3.4 |
3.53.5 |
|
|
fctk 0.95 (MPa) |
2.0 |
2.5 |
2.9 |
3.3 |
3.8 |
4.2 |
4.6 |
4.9 |
5.3 |
5.5 |
5.7 |
6.0 |
6.3 |
6.66.6 |
|
|
Ecm(GPa) |
27 |
29 |
30 |
31 |
33 |
34 |
35 |
36 |
37 |
38 |
39 |
41 |
42 |
44 |
|
|
ɛc1(‰) |
1.8 |
1.9 |
2.0 |
2.1 |
2.2 |
2.25 |
2.3 |
2.4 |
2.45 |
2.5 |
2.6 |
2.7 |
2.8 |
2.8 |
|
|
ɛcu1(‰) |
3.5 |
3.2 |
3.0 |
2.8 |
2.8 |
2.8 |
|
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|
ɛc2(‰) |
2.0 |
2.2 |
2.3 |
2.4 |
2.5 |
2.6 |
|
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|
ɛcu2(‰) |
3.5 |
3.1 |
2.9 |
2.7 |
2.6 |
2.6 |
|
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|
n |
2.0 |
1.75 |
1.6 |
1.45 |
1.4 |
1.4 |
|
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|
ɛc3(‰) |
1.75 |
1.8 |
1.9 |
2.0 |
2.2 |
2.3 |
|
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|
ɛcu3(‰) |
3.5 |
3.1 |
2.9 |
2.7 |
2.6 |
2.6 |
|
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