Fig. 4

SEM micrographs of FeCr slag (a), GP0 (b), GPS1 (c) and GPA2 (d) (L/S 0.26, KOH 10 M, curing at ambient temperature, curing time 28 d)
SEM micrographs of FeCr slag (a), GP0 (b), GPS1 (c) and GPA2 (d) (L/S 0.26, KOH 10 M, curing at ambient temperature, curing time 28 d)