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

Table 1

Details of the specimen.

Dimension (mm)	Diameter of hole (mm)	Hole length (mm)	Diameter of steel bar (mm)	Anchorage length of steel bar (mm)	(mm)
2000 × 1000 × 200	35	630	16	600	30

Note. is the constructional measure height (see Figure 1), which is equal to the diameter of the grouting outlet hole in this study.