Study on the Dynamic Properties of Concrete under Freeze-Thaw Cycles and CT Fine View Damage

Table 4

Internal fracture parameters of specimens at different number of freeze-thaw cycles.

Number of freeze-thaw cycles n	V (10^3 mm)	Before freezing and thawing			After freezing and thawing			ΔV (mm)^3	Δe (%)	ΔS (cm)^2
		(mm)^3	(%)	(cm)^2	(mm)^3	(%)	(cm)^2
0	48.77	56.78	0.12	26.17	56.78	0.12	26.17	0	0	0
25	48.57	68.45	0.14	36.16	890.05	1.83	430.45	821.60	1.69	394.29
50	48.75	86.19	0.18	46.5	1007.23	2.07	536.1	921.04	1.89	489.60
75	49.50	40.36	0.08	23.99	1340.54	2.71	649.66	1300.18	2.63	625.67
100	49.19	20.45	0.04	13.58	1590.16	3.27	825.96	1569.71	3.23	812.38