Freeze-Thaw Splitting Strength Analysis of PAC Based on the Gray-Markov Model

Figure 6

SEM images of PAC with a porosity of 19% after multiple freeze-thaw cycles. (a) No freezing-thawing. (b) 2 cycles. (c) 4 cycles. (d) 6 cycles. (e) 8 cycles. (f) 10 cycles. (g) 12 cycles. (h) 14 cycles. (i) 16 cycles. (j) 18 cycles. (k) 20 cycles.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(j)

(k)