270987.fig.009a
(a)
270987.fig.009b
(b)
270987.fig.009c
(c)
270987.fig.009d
(d)
Figure 9: The SEM micrographs of The OPC pastes (a) premixed with 1%, 3% and 5% of HBPAE ((b), (c), and (d)) hydrated upto 28 days.