Advances in Materials Science and Engineering / 2019 / Article / Fig 9

Research Article

Cost-Effective Treatment of Hemihydrate Phosphogypsum and Phosphorous Slag as Cemented Paste Backfill Material for Underground Mine

Figure 9

SEM images of specimens of backfill body. (a) S22 cured for 7 days; (b) S22 cured for 28 days; (c) S23 cured for 7 days; (d) S23 cured for 28 days.