Grouting Defect Detection of Lapped Bar Connections Based on Impact-Echo Method

Figure 9

Test results of all holes in the specimen. (a) Hole A (solid). (b) Hole B (solid). (c) Hole C (empty). (d) Hole D (10%-solid). (e) Hole E (20%-solid). (f) Hole F (30%-solid). (g) Hole G (10%). (h) Hole H (20%). (i) Hole I (30%).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)