Mechanical Properties of Concrete Produced with Coarse Aggregates from Different Mineralogical Origins Using Ultrasonic Tests

International Journal of Concrete Structures and Materials

Table 4 Velocity of ultrasonic wave propagation (V) and stiffness coefficient (C) obtained from ultrasound testing at frequencies of 45 kHz and 80 kHz for the mix ratios produced with different types of coarse aggregate

Gravel type	Parameter	45 kHz				80 kHz
Gravel type	Parameter	Min	Max	Average	CV (%)	Min	Max	Average	CV (%)
Basalt	V (m.s⁻¹)	3287	3927	3547	6.9	3306	3944	3575	6.7
	A and K	1.5 and − 1.1				1.3 and − 1.0
	C (GPa)	23.1	35.7	28.1	17.3	23.4	36.0	28.5	16.9
	A and K	1.5 and − 1.1				1.4 and − 1.1
Limestone	V (m.s⁻¹)	3501	4497	3956	10.8	3563	4515	3996	10.5
	A and K	0.3 and − 2.0				0.2 and − 2.0
	C (GPa)	26.0	47.1	35.4	25.7	27.0	47.5	36.1	25.1
	A and K	0.4 and − 2.0				0.3 and − 2.0
Gneiss	V (m.s⁻¹)	3347	4106	3704	8.1	3361	4176	3736	8.5
	A and K	0.3 and − 1.6				0.5 and − 1.6
	C (GPa)	24.1	38.2	30.5	18.5	24.3	39.5	31.0	19.3
	A and K	0.5 and − 1.7				0.7 and − 1.6
Granite	V (m.s⁻¹)	3350	4283	3688	9.5	3358	4322	3721	10
	A and K	1.6 and − 0.9				1.5 and − 1.2
	C (GPa)	23.0	42.1	29.4	24.4	23.0	42.9	30.0	25.6
	A and K	2.0 and − 0.7				1.9 and − 1.0
General	V (m.s⁻¹)	3371	4203	3724	8.8	3397	4239	3757	8.9
General	C (GPa)	24.1	40.8	30.9	21.5	24.4	41.5	31.4	21.7

Statistical parameters: Minimum (Min), maximum (Max), average values, coefficients of variation (CV), asymmetry (A), and kurtosis (K)