Research Article
Research on Preparation and Performance of Clay-Based Shield Tunnel Nonsintered Bricks
Table 1
Chemical composition of main raw materials (%).
| Name | Loss on ignition | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | R2O | SO3 | Total |
| Shield muck | 10.4 | 53.4 | 13.5 | 6.4 | 10.0 | 1.8 | 4.5 | ā | 100 | Cement | 1.76 | 21.8 | 5.5 | 3.81 | 61.85 | 1.69 | 1.05 | 2.54 | 100 | Fly ash | 8.1 | 50.6 | 28.4 | 6.1 | 3.8 | 1.1 | 1.9 | ā | 100 |
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