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Table 2 The average results of destructive and non-destructive tests.

From: Evaluation of Fire-Damaged Concrete: An Experimental Analysis based on Destructive and Nondestructive Methods

Mix

Temp.

Compressive strength (MPa)

Splitting tensile strength (MPa)

Secant elastic modulus

HNP

Nonlinearity parameter (D)

C1

Initial (20 °C)

52.11

4.33

33.25

1.82 (10−6)

0.046

200 °C

37.17

3.96

22.89

5.98 (10−6)

0.225

400 °C

30.37

2.59

8.169

1.12 (10−5)

4.645

600 °C

23.96

1.00

2.911

2.84 (10−5)

21.25

C2

Initial (20 °C)

39.03

3.56

28.61

9.02 (10−7)

0.022

200 °C

27.08

3.34

18.74

4.73 (10−6)

0.240

400 °C

25.67

2.15

6.651

1.54 (10−5)

3.093

600 °C

18.29

0.84

2.154

2.97 (10−5)

20.536

C3

Initial (20 °C)

46.71

4.11

30.82

7.68 (10−7)

0.030

200 °C

34.78

3.62

18.88

4.30 (10−6)

0.224

400 °C

27.68

2.46

7.190

1.15 (10−5)

2.330

600 °C

21.81

1.07

3.002

2.04 (10−5)

14.26

C4

Initial (20 °C)

38.70

3.78

27.32

6.82 (10−7)

0.021

200 °C

28.42

2.93

16.33

3.19 (10−6)

0.153

400 °C

24.35

2.10

5.964

9.03 (10−6)

1.513

600 °C

17.95

0.70

1.976

2.1 (10−5)

16.70