Study of Durability of Concrete with Fly Ash as Fine Aggregate under Alternative Interactions of Freeze-Thaw and Carbonation

Figure 12

SEM of Group A2 samples before test and after the fourth alternating cycle period: (a) A2; (b) A2-C; (c) A2-F; (d) A2-CF; (e) A2-FC; (f) A2-FC.

(a)

(b)

(c)

(d)

(e)

(f)