Effect of Fast Freeze-Thaw Cycles on Mechanical Properties of Ordinary-Air-Entrained Concrete

Table 5

The value of 𝛼₁, 𝛼₂, 𝛼₃, 𝛽₁, 𝛽₂, and 𝛽₃ after different freeze-thaw cycles.

	Cubic compressive strength			Compressive strength
	𝛼1	𝛼2	𝛼3	𝛽1	𝛽2	𝛽3
C50	−0.21	1.19	1.38	0.04	0.94	1.13
C40	−0.42	1.41	1.48	−0.21	1.19	1.48
C30	−0.53	1.54	1.20	−1.01	1.99	2.35
C25	−1.33	2.32	2.08	−1.52	2.50	2.74
C20	−2.84	3.83	4.15	−2.09	3.09	3.20