Potential of Palm Oil Fuel Ash as a Partial Replacement of Fine Aggregates for Improved Fresh and Hardened Mortar Performance

Figure 11

SEM micrographs of mortar on day 7 at 50 micron scale with 1500 magnifications: (a) 0% POFA, (b) 2.5% POFA, (c) 5% POFA, (d) 7.5% POFA, and (e) 10% POFA.

(a)

(b)

(c)

(d)

(e)