Advances in Bridge Engineering

Table 1 Summary of the statistics for characteristics

From: Comprehensive index condition assessment of structural concrete based on surface wave techniques

Characteristic	Statistics
Characteristic	σ	COV	R²	Sensitivity^a
f_c’ (MPa)	12.7	43%	0.98	79
V_P (m/s)	305	7.4%	0.97	20
V_R (m/s)	260	12.6%	0.92	32
α (m^-1)	2.5	32%	0.89	122

^aSensitivity refers the total change over to the initial value

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