Table 3.

Results of concrete ultrasound velocity test in borehole No. 2.

Ordinal Number	Height from the Bottom of the Floor (cm)	Ultrasound Netto Passing Time in Direction I-I tn I-I(μs)	Ultrasound Netto Passing Time in Direction II-II tn II-II (μs)	Mean Ultrasound Netto Passing Time tn (μs)	Ultrasound Wave Velocity CL (km/s)	Concrete Compression Strength fc (MPa)
1	20.5	31.3	30.5	30.90	3.040	24.24
2	20.0	31.1	30.1	30.60	3.070	25.28
3	19.5	30.4	30.3	30.35	3.096	26.19
4	19.0	29.6	30.7	30.15	3.116	26.95
5	18.5	29.7	30.1	29.90	3.142	27.94
6	18.0	28.4	28.8	28.60	3.285	33.83
7	17.0	28.4	28.9	28.65	3.279	33.58
8	16.0	28.4	28.3	28.35	3.314	35.14
9	15.0	27.6	28.4	28.00	3.355	37.07
10	14.0	27.6	28.1	27.85	3.373	37.94
11	13.0	28.0	28.3	28.15	3.337	36.22
12	12.0	27.8	28.0	27.90	3.367	37.64
13	11.0	28.0	28.0	28.00	3.355	37.07
14	10.0	28.6	28.5	28.55	3.291	34.09
15	9.0	27.6	28.5	28.05	3.349	36.78
16	8.0	27.4	28.3	27.85	3.373	37.94
17	7.0	27.6	27.6	27.60	3.404	39.44
18	6.0	27.7	27.9	27.80	3.379	38.23
19	5.0	27.4	27.8	27.60	3.404	39.44
20	4.0	27.7	27.9	27.80	3.379	38.23
21	3.0	27.6	27.5	27.55	3.410	39.75
22	2.0	28.1	28.6	28.35	3.314	35.14
23	1.0	27.4	26.6	27.00	3.480	43.35
24	0.2	27.4	26.0	26.70	3.519	45.49