Comparative Study on the Performance of Blended and Nonblended Fly Ash Geopolymer Composites as Durable Construction Materials

Figure 9

(a) Sample SMF1 showing a needle-like structure after 1 month of exposure to magnesium sulfate solution (optical microscope at 10x magnification). (b) Sample SMF1 showing white precipitant after 6 months of exposure to magnesium sulfate solution (optical microscope at 10x magnification). (c) Sample SMSB2 showing the fresh surface after 1 month of exposure to magnesium sulfate solution (optical microscope at 10x magnification). (d) Sample SMSB2 showing very little precipitants on the surface after 6 months of exposure to magnesium sulfate solution (optical microscope at 10x magnification).

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