Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack

Table 5

Element content of corrosion products.

	Element	Content (%)	SD (%)	Atom (%)
I	C	7.63	0.2	15.21
	O	29.02	0.93	43.44
	Na	1.43	0.39	1.49
	Al	1.78	0.31	1.58
	Si	6.51	0.33	5.55
	S	4.65	0.3	3.48
	Ca	4.65	0.3	3.48
II	C	10.09	0.25	17.89
	O	37.66	0.75	50.14
	Na	0.89	0.39	0.83
	Al	3.99	0.31	3.15
	Si	9.45	0.34	7.17
	S	5.07	0.32	3.37
	Ca	32.84	0.69	17.45
III	C	11.78	0.36	20.83
	O	35.85	1.21	47.60
	Na	0.54	0.59	0.50
	Al	3.03	0.48	2.39
	Si	9.89	0.51	7.48
	S	4.37	0.49	2.90
	Ca	34.54	1.05	18.41