(a)
(b)
(c)
(d)
(e)
(f)
Figure 7: SEM images of specimens cured for 28 days: (a) B2-0 min-35%, (b) C2-20 min-35%, (c) D1-40 min-20%, (d) D2-40 min-35%, (e) D3-40 min–50%, and (f) E2-60 min-35%.