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

Table 2

Void-size determination errors in plain concrete.

Void size (cm)	Estimated value (cm)	Error (%)
2	2.00	0.00
3	2.80	−6.55
4	3.77	−5.71
5	4.87	−2.65
6	6.06	0.98
7	7.26	3.75
8	8.44	5.45
9	9.42	4.70
10	10.14	1.41
11	10.49	−4.62