Joint

Exposed time (Hrs)

MMF

(˚C.H)

Joint bonding strength with different treatment method (MPa.)

By grout

By mortar

Without treatment

Average

MPa

% by parent RCC

Average

MPa

% by parent RCC

Average

MPa

% by parent RCC

7/8

60

2064.9

0.9*

65.7

0.76*

55.5

0.50

36.5

6/7

48

1866.8

1.02*

74.5

0.80*

58.4

0.36

26.3

5/6

36

1330.1

1.10

60.3

0.73

53.3

0.44

40.1

4/5

22

757.1

1.02

58.6

1.25

71.8

0.64

36.8

3/4

16

589.7

1.34

77.0

1.28

72.0

1.04

59.8

2/3

10

300.1

1.47

84.5

1.33

75.0

1.28

73.6

1/2

4

178.5

1.43

82.2

1.55

88.0

1.44

82.8