Table 3 Values of a and b for different cycle Times.

From: Modeling nonlinear stress-strain model for sulfate dry-wet cycle erosion of concrete: considerations for the initial compaction stage

Uulfate concentration

5%

15%

Number of dry-wet cycles

a

b

a

b

0

52.568

1.994

52.568

1.994

7

13.089

1.658

20.658

1.739

14

37.967

1.918

32.077

1.840

21

56.142

1.963

77.784

2.040

42

79.432

2.137

18.912

1.789

63

35.965

1.921

15.401

1.718

R2

0.996

0.999

0.999

0.999

RMSE

0.424

0.00128

0.319

0.00214

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