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Table 5 MOE calculation parameters for 5–50 years.

From: Effect of a Time Dependent Concrete Modulus of Elasticity on Prestress Losses in Bridge Girders

tfinal (years)

kc (Eq. 11)

Creep coefficient, ψ (Eq. 8)

ACI f′c(t), MPa (Eq. 13)

5

0.659

1.94

4,698

10

0.689

2.09

4,700

15

0.700

2.16

4,702

20

0.705

2.19

4,703

25

0.709

2.22

4,703

30

0.711

2.23

4,704

35

0.713

2.25

4,704

40

0.714

2.26

4,704

45

0.715

2.26

4,704

50

0.716

2.27

4,705