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

Table 3

Compressive strength of O-A-E concrete after fast freeze-thaw cycles.

	Number of fast freeze-thaw cycles
	0	50	100	150	200	300	350	400
C50	39.19	37.80	38.66	37.96	37.50	35.50	33.99	30.12
C40	31.02	30.30	30.52	29.30	31.10	28.42	25.33	23.10
C30	26.30	25.90	25.90	24.80	23.33	22.63	17.50	14.25
C25	22.10	21.22	21.22	20.60	17.50	15.69	10.50	/
C20	18.06	18.10	16.60	15.90	14.00	8.20	7.20	/