Research Article
Preparation and Sealing Performance of a New Coal Dust Polymer Composite Sealing Material
Table 1
Values of factors and levels.
| Level | Factor | Coal-dust content (%) (A) | Water-material ratio (B) | Cross-linking agent content (%) (C) |
| 1 | 50 | 1.0 : 1 | 1.5 | 2 | 75 | 1.2 : 1 | 2.0 | 3 | 100 | 1.5 : 1 | 2.5 | 4 | 125 | 1.9 : 1 | 3.0 |
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