Experimental Study on the Effect of Freeze-Thaw Cycles on Axial Tension and Compression Performance of Concrete after Complete Carbonization

Table 2

Number and grouping of specimens in the axial tension test.

Strength grade	Specimen number	Number	Strength grade	Specimen number	Number	Strength grade	Specimen number	Number
C30	30C0F0	3	C40	40C0F0	3	C45	45C0F0	3
	30CF0	3		40CF0	3		45CF0	3
	30CF25	3		40CF25	3		45CF25	3
	30CF50	3		40CF50	3		45CF50	3
	30CF75	3		40CF75	3		45CF75	3
	30CF100	3		40CF100	3		45CF100	3

30C0F0 means that C30 concrete has no carbonation and freeze thaw; 30CF50 means that C30 concrete is completely carbonized first, followed by freeze-thaw cycles of 50 times. Numbering of other specimens is similar.