The Measurement of P-, S-, and R-Wave Velocities to Evaluate the Condition of Reinforced and Prestressed Concrete Slabs

Table 6

Comparison of dynamic moduli from ultrasonic and static tests.

Measurement	Slab	Ultrasonic test		Static test				Error
		Avg; m/s	Edu (GPa)		fck (Mpa)	(GPa)	(GPa)
P-wave	S1	3285	22.80	0.16	14.84	17.68	21.30	7.01%
	S2	3367	23.96	0.16	14.84	17.68	21.30	12.46%
	S3	3362	23.88	0.16	14.84	17.68	21.30	12.09%
S-wave	S1	1910	22.67	0.16	14.84	17.68	21.30	6.43%
	S2	1960	23.87	0.16	14.84	17.68	21.30	12.07%
	S3	1950	23.63	0.16	14.84	17.68	21.30	10.93%
R-wave	S1	1880	22.55	0.16	14.84	17.68	21.30	5.86%
	S2	1934	23.87	0.16	14.84	17.68	21.30	12.06%
	S3	1918	23.46	0.16	14.84	17.68	21.30	10.15%

Edu: dynamic modulus by ultrasonic test, fck: 28-day compressive strength.