Small-Scale Void-Size Determination in Reinforced Concrete Using GPR

Table 3

Void-size determination errors of the rebar.

Void size (cm)	Estimated value (cm)	Error (%)
2	2.00	0.00
3	2.82	−6.00
4	3.73	−6.75
5	4.81	−3.80
6	6.01	0.17
7	7.26	3.71
8	8.46	5.75
9	9.47	5.22
10	10.16	1.60
11	10.53	−4.27