Figure 8
EDX (a) and SEM morphology of (b) unreacted metakaolin residue appears as hexagonal sheets, EDX (c) and SEM morphology (d) of quartz residue appears as a smooth surface and SEM images for the pores are few in number, small in size and slits are uninterrupted (e), and the pores larger than 10 µm in diameter of geopolymer samples prepared from metakaolin filled with cement kiln dust (f).
