Experimental Study on the Durability of Alkali-Activated Slag Concrete after Freeze-Thaw Cycle

Figure 4

Microstructure of the AASC specimens after different freeze-thaw cycles: (a) 0 cycles; (b) 100 cycles; (c) 200 cycles; (d) 300 cycles.

(a)

(b)

(c)

(d)