Table 6 Effect of hole diameter on maximum bond stress of post-installed anchors.

From: Bond of ribbed and threaded steel reinforcement bars post-installed in concrete considering bonded length and adhesive type

Lb = 5 db

Lb = 10 db

Lb = 15 db

Specimen

τu (MPa)

Gain in τu (%)

Specimen

τu (MPa)

Gain in τu (%)

Specimen

τu (MPa)

Gain in τu (%)

RS5-12

18.8

0.00

RS10-12

11

0.00

RS15-12

9.4

0.00

RS5-16

24

27.66

RS10-16

15.4

40.00

RS15-16

11.4

21.28

RS5-18

24.8

31.91

RS10-18

15.8

43.64

RS15-18

11.5

22.34

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