Influence of Alternation of Sulfate Attack and Freeze-Thaw on Microstructure of Concrete

Table 4

Expansion ratio of paste samples.

Samples	Expansion ratio in water				Expansion ratio in Na2SO4 solution
	7 d	28 d	90 d	180 d	7 d	28 d	90 d	180 d
1	0	11	58	36	4	76	200	328
2	2	22	48	24	8	124	212	300
3	8	36	84	72	16	124	208	272