Evaluation of Freeze-Thaw Durability of Silica Fume Concrete with Spraying Inorganic Coating Using Ultrasonic Testing

Table 7

Parameters of linear relationship between ultrasonic compressive pulse velocity and dynamic modulus of elasticity.

Specimen	a′	b′	Determination coefficient
All samples	17.775	−33.762	0.9969
C40-A1-NCTC	17.913	−34.501	0.9988
C40-A2-NCTC	17.594	−32.909	0.9991
C40-A3-NCTC	18.435	−36.495	0.9894