Experimental Investigation of Neutralisation of Concrete with Fly Ash as Fine Aggregate in Freeze-Thaw Environment

Figure 7

SEM of group S2 samples before test and after 30-day carbonation in different test modes. (a) S2, (b) S2-C, (c) S2-CF, and (d) S2-FC.

(a)

(b)

(c)

(d)