128158.fig.007a
(a)
128158.fig.007b
(b)
128158.fig.007c
(c)
128158.fig.007d
(d)
Figure 7: (a) Control beams (group A, Con1) under load; (b) formation of flexure crack in the beam JF1, under load; (c) formation of flexure crack in the beam JF2, under load; (d) formation of flexure crack in the beam JF3, under load.