Nondestructive Evaluation of FRP-Concrete Interface Bond due to Surface Defects

Figure 6

Surface voids. (a) Sample 3 (10.2 mm voids). (b) Sample 4 (20.3 mm voids). (c) Sample 5 (20.3 mm voids). (d) Sample 6 (40.5 mm voids).

(a)

(b)

(c)

(d)