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

Table 6

Variation characteristic in the ultrasonic shear pulse velocity of three kinds of concrete under FT cycles.

Specimen	VS at 0 FT cycles (km/s)	VS at 300 FT cycles (km/s)	Decay rate of VS (%)
C40-A1-NCTC	2.84	2.18	23.33
C40-A2-NCTC	2.84	1.97	30.49
C40-A3-NCTC	2.86	2.31	19.29