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

Figure 10

SEM micrographs of mortar on day 3 at 50 micron scale with 1500 magnification: (a) 0% POFA, (b) 2.5% POFA, (c) 5% POFA, (d) 7.5% POFA, and (e) 10% POFA.

(a)

(b)

(c)

(d)

(e)